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Operator
Good day, ladies and gentlemen. And welcome to the PerkinElmer fourth quarter 2015 earnings call. At this time, all participants are in a listen-only mode. Later, we will have a question-and-answer session. And instructions will be given at that time.
(Operator Instructions)
I would you now like to turn the call over to your host for today's conference, Mr. Tommy Thomas, Vice President of IR. Sir, you may begin.
- VP of IR
Thank you, Bridget. Good afternoon and welcome to the PerkinElmer fourth quarter and full year 2015 earnings conference call. With me on the call are Rob Friel, Chairman and Chief Executive Officer; and Andy Wilson, Senior Vice President and Chief Financial Officer. If you have not received a copy of our earnings press release, you may get one from the investor section of our website at www.perkinElmer.com.
Please note that this call is being webcast live and will be archived on our website until February 18th, 2016. Before we begin we need to remind everyone of the Safe Harbor statements that we have outlined in earnings press release issued earlier this afternoon and also those in our SEC filings. Any forward-looking statements made today represent our views only as of today. We disclaim any obligation to update forward-looking statements in the future even if our estimates change. So you should not rely on any of today's forward-looking statements as representing our views as of any date after today.
During this call we will be referring to certain non-GAAP financial measures. A reconciliation of the non-GAAP financial measures we plan to use during this call to the most directly comparable GAAP measure is available as an attachment to our earrings press release. To the extent we use non-GAAP financial measures during this call that are not reconciled to GAAP in the attachment, we will provide reconciliations promptly.
I am now pleased to introduce the Chairman and Chief Executive Officer of PerkinElmer, Rob Friel.
- Chairman and CEO
Good afternoon and thank you for joining us today.
I'm pleased to report that PerkinElmer delivered a solid performance in the fourth quarter, wrapping up a particularly successful year. One in which we delivered significant value for both our customers and shareholders.
Looking at the fourth quarter specifically, we grew organic revenue by 3% and on a constant currency basis grew revenue by 5% and adjusted earnings per share by 11%. We also achieved strong operating cash flow of $126 million which represented growth of over 30% over the fourth quarter of 2014. For the full year, we grew organic revenue by 4% and on a constant currency basis grew revenue by 7%. Expanded adjusted operating margins by 50 basis points and increased adjusted earnings per share by 13% to $2.55.
All of these financial metrics met or exceeded the goals we established in January last year, despite a more challenging economic environment than anticipated. In addition to our strong financial performance, we also you achieved excellent progress against our 2015 strategic priorities, addressed critical customer needs throughout our end markets, and expanded our capabilities technically, organizationally and geographically. Moreover our increased emphasis on innovation is now recognized throughout the industry and has resulted in a number of impressive awards. For example, our Phenoptics platform for quantitative pathology was named one of the top 10 innovations of 2015 by, The Scientist Magazine. And our NexION 350 ICP mass spec, was chosen as the best new spectrometer by SelectScience at last year's Pittsburgh conference.
As we enter 2016, I'm excited about the opportunities I see to advance our mission and profitably grow the Company. While we expect challenging global economic conditions to continue, our hard work up to this point has positioned us well to both invest in several compelling growth opportunities and at the same time deliver consistently attractive financial results. Specifically, rapidly changing technologies and analytics are playing a more pivotal role in healthcare and science than ever before. Growing populations are demanding better access to expanded healthcare offerings and safer food while regulatory changes are focusing on the health of our families and the environment.
The strategic priorities we have set for 2016 support the objective of improving our financial, organizational, and scientific capabilities enabling us to make an even more profound different around the world. For this year, the majority of our efforts will be focused on three areas. First, investing where we believe we have the most significant opportunities to increase, maintain, or capture leading share positions. Second, we are concentrating and expanding resources to accelerate our current momentum in driving innovation. While some of our competitors compete based on scale and scope, we are directing our efforts towards serving high growth markets with differentiating capabilities which we believe will in turn create greater customer value. A large part of what differentiates PerkinElmer is our ability to offer novel solutions that leverage the combined power of our technical capabilities and deep application knowledge. This year we are increasing our efforts to more effectively collaborate with our customers and thereby enhance their scientific discoveries or in some cases jointly enable breakthrough technologies. Third, we will continue to drive operational effectiveness globally by implementing a multifaceted approach aimed at improving processes, simplifying our supply chain, improving quality, and driving efficiencies. This approach combined with an imperative to continually enhance the organization's talents and skills will both advance our competitiveness and improve profitability.
Before Andy provides more color around our financial results and 2016 guidance, I would like to discuss the key strategic areas of focus and the investments we are making to support our future growth. With the broad set of offerings, it's important to differentiate our investments and focus on the programs that we believe will best advance our mission and provide the greatest opportunity for healthy financial returns. For 2016, these areas of investment include reproductive health, emerging market diagnostics, food quality and safety, and laboratory services. I'd like to spend a few minutes on each of those four areas.
Our first area of focus is reproductive health. Worldwide today there are over 130 million babies born every year. Sadly, the majority of these newborns are never screened for serious but treatable metabolic disorders. As a result of the lack of testing, hundreds of thousands of newborns annually are inflicted by life altering conditions that in some cases lead to a premature death. We believe this presents a significant opportunity for PerkinElmer to make a difference. And we are investing to expand who we test, how we test, and for what disorders we test.
For example, many specialty and top pharmaceutical companies are increasing their focus on developing therapeutics for rare early childhood diseases. As more treatment options become available for these rare diseases, we are developing this critical screening test needed to implement them. Many times these tests are developed in partnership with these pharmaceutical companies enabling early disease detection and ultimately providing more children with the opportunity for a healthy start to life. We are particularly excited about the development work currently under way for assays that detect: spinal muscular atrophy, Duchenne Muscular Dystrophy, Lysosomal storage and immunodeficiency disorders.
Also within reproductive health, we are investing in prenatal testing. We recently announced our acquisition of Vanadis Diagnostics, which is developing a novel NIPT platform based on digital analysis of cell-free DNA. After a period of investment we will be able to offer our customers a next generation solution that gives wider access for NIPT for expecting mothers, with a cost effective simplified work flow that many biochemistry laboratories can easily run.
In emerging market diagnostics, we see significant opportunities to leverage our channel and capabilities by expanding our infectious disease testing portfolio. We are developing new tests including multiplex B based genotyping assays for respiratory panel, hepatitis B and C, & HPV, as well as an HIV quantitative viral load PCR assay. We are also continuing to expand our Xinjiang blood screening business in China and leveraging our medical lab in Suzhou to expand its testing menu.
Turning to the rapidly growing food safety segment. We are prioritizing our efforts to strengthen our franchise through the success of our Perten acquisition, and by expanding our detection capabilities to better help customers analyze food quality and authenticity. This year we will continue to invest in our detection solutions and leverage our extensive application knowledge and proprietary library of sample calibrations. These investments will bolster our position as the market leader in protein and moisture analysis enabling robust quality evaluations to be performed across each step in the supply chain of food products. Recently, we were able to transform our bench top infrared technology used to determine food moisture levels and batch analysis and deploy it as an online continuous analyzer to measure quality and the production of final products. We are also working with a large number of major global food producers to ensure the food supply is genuine, unadulterated and free of residues and other contaminates. We believe this capability will increasingly become more important as governmental regulation and public concerns grow.
Finally, in the laboratory services we will continue to invest in our OneSource and Informatic capabilities. As pharmaceutical and biotechnology customers seek to outsource their laboratory services to drive efficiencies and externally collaborate on the scientific research to advance open innovation. Specifically we will invest in our leading electronic notebook platform to facilitate collaborative research and in high value scientific applications such as our TIBCO Spotfire Software for harnessing big data. In addition we will expand our clinical and analytics capabilities and develop new solutions for translational research and personalized medicine by leveraging our Signals platform which integrates disparate data sets into a single platform for data discovery.
On the service side, we will continue to develop our integrated service capabilities which can effectively align lab operations to improve scientific outcomes. Through these investments, we look to expand our work with existing and new pharmaceutical and biotech customers, as well as establish our service in additional end markets. To fund these potential significant opportunities, our 2016 operating plan incorporates an increase in R&D while also generating healthy margin and EPS growth. While Andy will discuss our 2016 financial outlook in more detail, we are forecasting overall end market conditions to be similar to what we experienced in the latter part of last year with some minor puts and takes. Consequently, we are guiding adjusted earnings per share of $2.65 to $2.75 which represents constant currency adjusted earnings per share growth of 8% at the midpoint based on corresponding organic revenue growth of 3% to 4%. Despite our plan to increase R&D by about 10%, or 40 basis points of revenue, we are forecasting constant currency adjusted operating margin expansion of 50 basis points.
I will now turn the call over to Andy to discuss our financial results and operating plan in greater detail.
- SVP and CFO
Thanks Rob and good afternoon to everyone.
Consistent with previous quarters I'll provide some additional color on our end markets, a financial summary of our fourth quarter and full year results as well as details around our 2016 first quarter and full year guidance.
Given the foreign exchange has had a material impact on our financial results throughout 2015, I will once again provide much of my commentary on a constant currency basis in order to better portray our year-over-year results. For the fourth quarter and full year 2015, foreign exchange negatively impacted revenues by $32 million and $142 million respectively, and negatively impacted fourth quarter and full year adjusted earnings per share by $0.08 and $0.25 respectively versus the comparable period a year ago.
For the fourth quarter, adjusted revenues were approximately $608 million which represents currency revenue growth, constant currency revenue growth of 5%, organic revenue growth of 3%, with FX negatively impacting revenue growth by 5%. Adjusted earnings per share was $0.86, up 11% on a constant currency basis from $0.85 in the comparable period a year ago. Please note, since we provided fourth quarter guidance in October, foreign exchange further impacted fourth quarter revenue and adjusted earnings per share by approximately $5 million and $0.02 per share respectively.
The trends we saw through the first three quarters of 2015 continued through the fourth quarter. Looking at our end markets we continue to see strength in pharma and biotech; stable academic and government spending; healthy demand in diagnostics and food testing; and stable but somewhat but somewhat slower growth in our environmental, safety and industrial markets. Looking at our geographic results for the fourth quarter, we experienced high single digit organic revenue growth in Asia, while the Americas grew low single digits and Europe was essentially flat due to very difficult prior period comparisons, specifically in our research and analytical equipment businesses. In the BRIC region fourth quarter organic revenue increased double digits versus the same period last year driven by strength in China, partially offset by weakening demand in Brazil and Russia.
Switching to the segments for the fourth quarter, environmental health organic revenue grew approximately 5%, with human health increasing 2% as compared to the same period a year ago. From an end market perspective, our human health business represented approximately 60% of reported revenue for the fourth quarter of 2015, with diagnostics representing approximately 27% of reported revenue, while life sciences solutions represented approximately 33% of reported revenue. Fourth quarter 2015 organic revenue growth from our diagnostics business increased mid-single digits as compared to the prior period driven by strength in our prenatal screening and infectious disease franchises. Medical imaging grew low single digits in the quarter as demand for our CMOS and our new cassette panel was offset somewhat by weakening demand in radiography and radiation oncology end markets.
Looking at the performance of our diagnostics business in China, our Xinjiang blood screening business had an excellent quarter which included a significant number of instrument placements and we look forward to helping ensure a safe blood supply in China in 2016 and beyond. Overall our diagnostics business in China finished the year with broad based growth and delivered a double-digit growth performance in the quarter.
Organic revenue in our life science solutions business grew low single digits in the quarter, driven by strong US sales and continued robust growth in our OneSource multi-vendor service offering despite a very difficult prior year comparison. Geographically within LSS, Japan continues to be weak and was a major drag on overall organic growth. In contrast to Japan, we were encouraged by the double-digit growth we experienced with our key global pharmaceutical and biotech customers. We have now reached the one year mark of the combination of our research, Informatics, and OneSource businesses, and we believe that we are uniquely well positioned to serve our customers.
Moving to environmental health which represented approximately 40% of reported revenue, revenues grew 5% organically for the fourth quarter of 2015. Our fourth quarter reported results benefited from broad based demand with particular strength in food as well as incremental licensing revenues. We are pleased to report that the Perten business had a very good year with solid organic revenue growth, good margins and strong cash flow. We successfully achieved our year one deal model expectations and we look forward to building on this momentum going forward.
As Rob mentioned earlier, we had a strong performance in 2015 and I want to go over the highlights now. For the full year we reported approximately 7% constant currency revenue growth and 4% organic revenue growth with foreign exchange representing a headwind of approximately 6%. Full year adjusted revenue was approximately $2.26 billion as compared to $2.24 billion in 2014. Full year adjusted earnings per share was $2.55, up 13% on a constant currency basis from $2.47 in 2014.
Looking at our geographic results for the year, we experienced mid-single digit organic revenue growth across all major regions. In the BRIC region full year 2015 organic revenues increased approximately 6% compared to 2014. Looking at our emerging market organic revenue growth in total, it was once again up 7% for the full year which is consistent with our performance over the last several years. A testament to the criticality of our products and solutions that we provide.
As to our operating results, full year adjusted gross margins were 47.6%, up 20 basis points on a constant currency basis driven primarily by volume leverage, mix, and productivity gains. Full year adjusted SG&A was 24.4% of adjusted revenue, down 50 basis points on a constant currency basis over the same period a year ago driven by the success of our indirect spend initiatives. Full year research and development spending was higher by approximately 20 basis points as compared to 2014 driven by increased investment in new products. Overall, we were pleased with our operational performance for the full year as we expanded our constant currency adjusted operating margins over 50 basis points. Our full year net interest and other expense was essentially flat at $42 million and our full year adjusted tax rate was just over 19%, better than expected for the year, due essentially to the geographic mix of earnings into lower tax jurisdictions.
Turning to the balance sheet. We finished the year with approximately $1 billion of debt and nearly $240 million of cash. We exited the quarter with a debt to adjusted EBITDA ratio of 2.3 times and a net debt to adjusted EBITDA ratio of 1.7 times.
Turning to cash flow. I am very pleased to report that we had a very strong performance growing approximately 30% in the fourth quarter. We experienced robust working capital improvement with strong cash collections and lower inventory requirements. Excluding the $20 million of discretionary pension funding we talked about earlier in the year, operating cash flow for the full year 2015 was $307 million.
To wrap up 2015, we're pleased with our performance as revenue grew organically 4%, operating margins expanded 50 basis points and adjusted earnings per share grew 13% on a constant currency basis. Looking ahead to 2016, we continue to believe we're well positioned to deliver another solid financial performance. However, we continue to see the macroeconomic outlook as mixed.
For the full year 2016, we expect reported revenues to be in the range of $2.3 billion to $2.32 billion, up 2% to 3% representing organic revenue growth in a range of 3% to 4%, with foreign exchange representing a headwind of approximately 2%. Full year adjusted earnings per share is expected to be in the range of $2.65 to $2.75 which represents approximately 6% to 8% constant currency adjusted earnings per share growth or 8% at the midpoint.
Implicit in this guidance is constant currency adjusted gross margin expansion of approximately 70 basis points. As Rob mentioned we are increasing our research and development spending in 2016. This incremental 40 basis points in R&D spend is expected to be partially offset by lower SG&A spend of 20 basis points. As a result we expect to report full year 2016 constant currency adjusted operating margin expansion of approximately 50 basis points, while reported adjusted operating margins are expected to expand by approximately 40 basis points.
Our full year guidance also assumes an adjusted tax rate similar to 2015 or approximately 19.5% and a weighted average share count of approximately 111 million shares which assumes we deploy approximately half our free cash flow on share repurchases in the year. For the first quarter of 2016, we're forecasting reported revenues to grow organically about 3%, or $530 million to $535 million and first quarter 2016 adjusted earnings per share is expected to be in the range of $0.49 to $0.51.
This concludes my prepared remarks. Operator, at this time we'd like to open up the call for questions.
Operator
Thank you.
(Operator Instructions)
Our first question is from Matthew Mishan with KeyBanc. Your line is open.
- Analyst
Great. Thank you for taking my questions. On human health, that was where my model is a little bit off for the quarter, I think the organic growth came in around like 2%. I was thinking it was going to be in the 3 to 4. What was the driver of the lower performance in human health in the quarter?
- Chairman and CEO
I think it was fundamentally comparisons to Q4 last year. We had very strong growth in human health last year in a couple of the areas and I would say that was probably the overlying issue.
- SVP and CFO
I think if you recall last fourth quarter we talked about some revenue being pulled in, which created this very difficult comp. It was about $5 million. That obviously was another piece that we had to compare against in 2015.
- Chairman and CEO
When you look at the full year, human health and environmental health both grew about the same. So PerkinElmer was at 4%, human health was 4%, and environmental health was 4%. So in any given quarter, there can be some sort of above and beyond, either because of comparison purposes, or as Andy talked about, things can move in out of the quarter. But actually, it was fairly consistent when you look at the full year.
- Analyst
The first quarter versus the full-year guidance on the organic growth, the first quarter's 3% and for the full year, it's 3% to 4%. Can you comment a little bit about the cadence as you go through the year, as you expect a little bit more of a back-half weighted?
And then maybe a little bit about the seasonality around customer order patterns in the first quarter, and there's typically a little bit more conservatism from some of your customers in the first quarter, knowing that it could put some orders off into the rest of the year.
- Chairman and CEO
I think as we think about the cadence of the growth, clearly it will be a little stronger in the back half. Some of that is just a function of we've got the new products coming out as we saw in 2015. I think again, we had some large sales in the first quarter of last year that we're sort of cycling up against, particularly in the area of informatics. I think as we think about it, we'll see a little stronger growth. I think we're also a little concerned about the economic conditions in the first quarter, relative to what we see for the full year.
- Analyst
Thank you.
Operator
Thank you. Our next question is from Steve Bushaw with Morgan Stanley. Your line is open.
- Analyst
Thanks for taking the questions. Rob, I actually wanted to jump off on the point you just alluded to as you referenced macroeconomic conditions in the first quarter. It would be helpful if you could just isolate what you've seen in terms of the macro impact on the outlook and how that's evolved over the last 90 days or so.
And then to the extent you're looking for improvement over the balance of the year, can you give us a little bit more of a view on why it is that you're embedding that in the outlook?
- Chairman and CEO
So maybe it would be helpful just sort of walk through the end markets a little bit, both from an application perspective and a geographic. I would say specifically with regard to the beginning of the year versus the latter part of the year, I would say it's fundamentally in a couple areas. I think as we've talked about in the past, medical imaging I think has a little bit of a stronger headwind in the first half of the year, so we think they could be down sort of high single, maybe low double digits.
We believe we'll see that recovered in the back half. I think also when we think about Japan, Japan I think again, we expect to see a little bit more challenging in the early part of the year. And we think that's going to moderate here in the back. One of the reasons is, because again, we get easier comparisons in the back part of the year. I would say those are big contributors.
To just sort of walk through the end market in particular, I think in the case of the pharma-biotech market, we saw a good 2015. We grew sort of high single digits. We think that continues to be a strong market for us, maybe gets a little bit difficult from a comp, particularly on the OneSource service side.
But we've got some new systems coming out in the sort of middle, latter part of the year. We've got some new liquid handling, some cellular imagers and some reagent kits that we're excited about. We see that probably improving in the back half, but moderating, but continue to be a pretty strong market for us.
Academic was sort of low single for us last year. We think that improves a little bit clearly in the US because of the NIH budget, but continue to see probably flattish in Europe. That probably stays fairly consistent through the year. I think in the food market, we've seen good strength there, probably mid to high-single digits for 2015. We think that continues, the Perten integration going well.
We start to go up against some difficult comps in China because China was particularly strong for us, but we think that probably stays fairly consistent through 2016. I think the area that we're probably most concerned about is the industrial end market. And for 2015, it was sort of mid-single for us.
I think going into 2016, we think it's probably going to moderate here a little bit. And so I think we're a little concerned, particularly in the first half of the year, so we're calling that to be sort of more low-single digits with probably more pressure in the early part of the year and maybe improving here a little bit in the back.
And then finally on diagnostic side, I think we feel pretty good about that throughout the year. That was strong for us in 2015, and we think that continues to be strong, whether it's newborn, whether it's our infectious disease in emerging markets or prenatal. We think they all see pretty good strength here going into 2016, probably both in the first half as well as the back half.
- Analyst
And then I'll dove tail on that very briefly here, as it relates to China and the hospital environment in China. Are you seeing any signs that has stopped the sort of pace of improvement that we've seen here lately, or is that continuing to get a little bit better?
- Chairman and CEO
No, I think for you us we continue to see nice growth in China. Some of that may be distorted because of the strong wins we're seeing in the blood screening area that Andy alluded to. We're seeing very nice replacements there, so quite excited about. It may have to do with our mix of business. We continue to forecast strong growth in China. Of course on the newborn side, we continue to see nice growth there as well.
- Analyst
Really helpful. Thanks so much.
Operator
Thank you. Our next question is from Miroslava Minkova with Stifel. Your line is open.
- Analyst
Good afternoon, guys. Let me start with the top-line growth outlook. I appreciate all the commentary on the end markets. However, historically you have started with a slightly higher, more like in a 3% to 5% growth range and you've talked about accelerating growth towards the mid-single-digit average. Can you maybe sort of give us the puts and takes a little bit, why 3% to 4% this year? Is it all about the industrial markets, and how much would that be weighing on your overall top line?
- Chairman and CEO
I think that's probably the majority of the caution I would say going into 2016 here. As we're, as I said industrial for us grew mid-single digits in 2015, and as we sort of look at it right now, we're a little concerned about that. So we think that's going to be in the sort of more low-single digits. So I would say that's probably the largest contributor to it.
I would say also on the margin, I think we've talked about the medical imaging will probably be a little slower than what we've seen historically. I would say those are the two changes. But as we think about it, the 3% to 5% versus 3% to 4%, we still feel like it's in the sort of 3% to 4% range, so I wouldn't say -- I wouldn't read a significant deceleration into that.
- Analyst
Okay. And you gave us a lot of color on the areas where you're investing. You've stepped up R&D investments over the past year and sounds like you're stepping them up again in 2016. Can you give us your thoughts about -- should you be sustaining these investments in the context of the current macro environment? And how should we think about your product flow in 2016, can you sustain this as it has been the last few years, or should we be seeing more a cautious stand given where industrial markets in particular are?
- Chairman and CEO
I would say it's a couple things. First of all, as I sort of alluded to a little before, we see some great opportunity in some of our end markets. Whether it's in the reproductive health, whether it's in food, whether it's emerging diagnostics for the laboratory services. We think it would be unfortunate to not invest in those opportunities. We think there will be potentially significant growth down the road. That's number one.
I think the second thing is, we're starting to see I think good insight into the opportunity to expand gross margins. I think it's an area where if you look over the last couple years, while we've had good operating margin expansion, it's largely come from leveraging of our operating expenses. And as we have done some factory rationalization and shifting in the past, we're now sort of going into the factories themselves and driving lean initiatives and focusing more on the supply chain.
So I think we're more confident that over the next couple years we'll be able to see improved gross margin and use that sort of in some ways, invest more in the businesses. And I would say the third aspect of it is, I think we're trying to be more focused on where we're investing. I think what you'll see going forward is a more concerted effort to invest in those areas where I think we've got leadership positions and terrific capabilities. I think it's a combination of all those things.
- Analyst
Okay. Sounds good. Maybe if I could sneak in a final one. The foreign exchange surprise on the bottom line, you called that out of about $0.02 per share. It seems like, at least relative to my model, there wasn't that big of a difference in top line. Was there something about the mix of currency that happened this quarter? Where was the surprise?
- Chairman and CEO
Well, I think if you look at relative to when we guided in October until the end of the year, you saw some significant movement of foreign exchange, not only with some of the major currencies, but probably in particular in the emerging markets. I think when you look at our split of our international, of course we've got a fairly heavy concentration in emerging markets, and if you look at the movement that's occurred in the fourth quarter, it's been much more significant on the emerging market side.
- Analyst
Okay. Thank you, guys, and I'll get back in queue.
Operator
Thank you. And our next question is from Derik de Bruin with Bank of America. Your line is open.
- Analyst
Hey, good afternoon. A couple of questions. So looking at the -- if I heard you right, Andy, you said 40% reported operating margin expansion in 2015, so up from -- that's about 18.1-ish in 2016. Can we talk a little about forward operating margin expansion and that 20% target? Obviously FX has been a huge hit to the margin targets that you laid out. Can you just put us in terms of thinking about the longer-term trajectory, where this is going, is 20%, 22% still in the cards?
- SVP and CFO
I think it is. I think we've made a conscious decision though, as Rob mentioned, to invest some of that back. Our goal is not to get to 20%, 22% at all costs. We're investing some of that back this year. I think underlying all this is the fundamental growth that I think still supports the 60 to 80 basis points, and I think we're going to drive potentially more upside from that with some things that are going on in our gross margin that Rob just mentioned.
I think at this stage, it may not be completely linear, but I think two things. One is we're going to continue to do the things to drive operating margin, whether that be lean or indirect spend, but I think a lot of these investments that we're making in new products are going to start to convert into revenues that are going to be higher margin as well. I think if you look at it from a three- or four-year point of view, which is the way we look at it, we still feel very, very good about our ability to hit that 20% to 22% operating margin.
- Analyst
Great. So I want to talk a little about the acquisition you just did to Vanadis, for the NIPT technology. A couple of questions on this. First one is what's going to be the incremental R&D spend to sort of get that to market? I know they've -- just looking at the white paper that they have out, I know there's a proof of principle and they've got some clinical data that's out. But it still looks like it is a ways. What's the invest and what's the time frame before that's going to be ready for prime time?
- Chairman and CEO
I would say if you look at the incremental R&D investment we're talking about this year, probably half of it or so is coming from Vanadis. We're quite excited about the opportunity here. The way I would describe it is, I think we understand the screening market probably better than anybody with our work in newborn and prenatal. And our sense is it's critical to focus on the work flow. So rather than just looking at the detection technology, you've got to look at sample collection all the way to the patient report.
While we feel that NGS has identified with NIPT, has identified a significant need and opportunity to provide an alternative to invasive screening, our concern all along has been that the complexity of NGS, at least how it's done today, is not conducive to sort of large-scale population screening. And therefore, we felt, we've been looking for and continue to look at different technologies and a way to sort democratized noninvasive screening. And our sense all along is it's got be a simpler format, a simpler work flow and one that can be sort of deployed into the labs that are out there today.
As you may know, there's probably 1,500 biochemical labs in the world doing clinical testing, either through newborn or prenatal. Our sense is probably 100 or less than 10% are actually doing some kind of NGS for clinical testing. So clearly, we needed to find or I think there needs to be a simpler work flow.
And that's what excites us about Vanadis. It's simple. It's automated. You use basically one instrument. But to your point, it's early and so we need to invest, but we're quite excited about it, and it fits well within our current prenatal capabilities and channel.
- Analyst
Certainly it fits in with your work flow. The readers, the micro plate reader. The question I have on it, I guess from a technical standpoint, maybe you may need to go to this offline, I know it does a -- you take the cell-free DNA fragments and you convert them into circles like that. What's the efficiency in terms of doing the conversion and the rolling circle like this? This may be too technical. I'm just curious to see if it's high enough efficiency to sort of deliver the counts that you need on this.
- Chairman and CEO
Yes, I think our guys have looked at it. The other thing, it uses imaging technology with fluorescent. We understand that well. But to your point, it's early days. We'll continue to invest in it. But we're quite excited about it. This is a team that's been successful in the past and so we're feeling pretty good about it.
- Analyst
Great. Thanks.
Operator
Thank you. Our next question is from Doug Schenkel with Cowen and Company. Your line is open.
- Analyst
Good afternoon, guys, and thank you for taking my questions. So first topic is margin expansion. You've guided us to model, I think it's 50 basis points of constant currency operating margin expansion. This is a bit below what I think many were expecting. So two parts to just try to get at this topic. One, does this guidance fully capture the margin relief associated with the inventory issues you were working through last year associated with the Waters LC deal?
Secondly, keeping in mind that part of the reason margin isn't higher is that you plan to hide investment in R&D. You've been talking about your R&D investment leading to new product acceleration at the top line. Really, is that being a major driver to revenue growth or revenue acceleration?
It's not apparent based on recent results in your guidance that this is happening. So could you talk about whether you did hit your 2015 new product revenue target of $35 million, and what's embedded into 2016 revenue guidance for new products?
- SVP and CFO
Okay. Doug, this is Andy. Maybe I'll take the first part of the question and Rob will take the second part of the question. Our stated goal is and continues to be, we think we can drive with mid-single digit growth drive operating margin expansion to 60 to 80 basis points, some cases higher.
We made a conscious decision this year because of a couple of what we think are very promising R&D programs to invest, and so that is really the headwind to the margins. We're going to continue to try to drive more, but I think we feel like it's prudent to come out with a number that we feel like that we're comfortable with at least of at this point in the year.
- Chairman and CEO
And what I would say is first of all, relative to the NPIs, I think we've talked about -- we exceeded the $35 million that we laid out early in 2015 from the new product. Probably closer to $40 million actually when you look at the results. And I would say as we go here in early 2016, we think we'll do at least that amount, if not more. I would say the new products are doing well and we're getting them out into the marketplace.
I think the thing to consider though is, and we sort of mentioned this in the prepared remarks, is we set some goals together, put some goals out there in January that talked about 3% to 5% EPS gross margin expansion, and despite some sort of challenges from an economic perspective, we met or exceeded all those. So I would say the NPIs are doing well, but of course some of the things where some of the other end markets have been a little bit more challenging from a macroeconomic perspective is offsetting the progress we're making on the NPIs.
- Analyst
And one more. The commentary on industrial exposure, I think we're all hearing what's going on in the news and seeing some of the data, but your commentary is a bit more negative than I think what we've heard from others in the group thus far. Your percentage of sales exposure isn't all that different from the diversified tools peers.
I'm just trying to get at, what's driving this for you, and why would this be tougher in Q1 and improve over the year? Sorry to be basic out about this, but it's just hard to understand why this would be a temporary cyclical industrial concern. Is it comps or is it something else? Thank you.
- Chairman and CEO
Maybe I should sort of clarify. Let me separate. The industrial concern is one of a full-year concern, and as I said, it's as simple as we grew mid-single in 2015 and we think that moderates to low-single. So that's the concern. That's not necessarily a Q1 issue.
The Q1 issue is more tied to medical imaging and some sort of large revenue recognition that we had in informatics in the first quarter. So those two are separate. The industrial one is more of annual issue. I don't know if it's unique for us based on our product mix, but we are a little concerned about it. To your point, it's not a huge exposure for us, but on the margin it could be 30 or 40 basis points of growth there.
And then I think the other one is we're concerned about the comp on pharma, and so instead of growing high-single digits as we did in 2015, we probably think that moderates to sort of mid-single. Those are basically the two things as we look into 2016 versus 2015 that we think are different.
- Analyst
Okay. Thank you, guys.
Operator
Thank you. And our next question is from Tycho Peterson with JPMorgan. Your line is open.
- Analyst
Hey, guys, it's actually Patrick Donnelly in for Tycho. Looking at the China screening market, can you talk about the impact from moving, the year of the goat last year was a bit of a headwind, moving to the year of the monkey this year. Maybe just talk through how the birth rates were impacted last year and what kind of tailwind that could be to screening revs this year?
- Chairman and CEO
If you look at 2015, births in China were down about 10%. So we think it recovers that and maybe goes a little bit more. It's a little hard to parcel that out specifically because you've also got the one child relaxation. Our sense is you will see births up this year, relative to China, and whether that's high-single digits or low-double digits, it's probably in that type of range.
- Analyst
Okay. And then staying in China, just on the nucleic acid testing market, there was delayed implementation there. Can you talk through where we stand with the tenders and what the impact on 2016 could be from that market?
- Chairman and CEO
We saw a very strong tender activity, particularly in the fourth quarter. And so to a large extent, while it was slowed down early in the year, I would say they more than made up for that with the strong activity in the fourth quarter. And I think, as Andy mentioned in his comments, we were very pleased with our win rate there. So our expectation is, as we sort of get to the latter part of 2016, we'll start to see some of the ramp up in the reagents.
Normally what we've seen historically, there's probably a six-month implementation from when they get the instruments put in place and sort of they run some controls and tests and those types of things. So our expectation is we'll see the benefits of the wins that we saw in fourth quarter in the latter part of 2016.
- Analyst
And you're still thinking that business could ramp to, call it, $50 million over the next three years?
- Chairman and CEO
Yes, yes.
- SVP and CFO
I think that's fair.
- Chairman and CEO
We feel good about that.
- SVP and CFO
We're north to $10 million this past year, and with these placements and the reagent flow coming through, it will ramp fairly quickly.
- Analyst
Thanks, guys.
Operator
Our next question is from Jonathan Groberg with UBS. Your line is open.
- Analyst
Great. Thanks. Andy, just to -- I wasn't sure I exactly understood your answer. For 2017, you still think you're going to do 20% operating margin?
- SVP and CFO
2017? I actually wasn't responding to that. We were talking longer term. I would say given the investment and depending on where FX is, I think it's still the goal, but I think if FX continues to be a headwind, it's going to be a difficult goal. And again, as I mentioned before, we're not really trying to get to 20% just to get to 20%. We're trying to do it in a fairly logical, methodical way and invest back. Again, we made a conscious decision for 2016 to make those investments.
- Analyst
Sure. I get that. Your target before had been 20%, and from your previous answer, it wasn't clear to me. We should adjust for FX and maybe some of these investments in terms of what we're thinking about for OP margin in 2017.
- SVP and CFO
I think that's fair. If you go back to our 18% guidance, we came in at 17.6% that year. The difference was FX. There are going to be things that impact our ability to get there, but that's still our goal is to -- stripping that out, get to 20%.
- Chairman and CEO
I would say, John, we're trying to control the things we can control, and obviously FX is a difficult one to do I think. If you went back and tried to do it on sort of a pro-forma basis, based on a euro of $1.25, or something when we set this up, my sense is we probably could get to the 20%.
As we sit here, $1.10 for the euro or whatever, I think that's going to be more of a challenge. The other thing is recently in January we came in and talked about a 2017 target. We've talked more about a longer-term 2020 target and felt like we could go another 400 basis points to 22%. So I think that's how we're modeling it. As we modeled that, we had R&D going up to 6% of sales, or 50% increase in R&D, and the way we're offsetting that is we expect 300 basis points of gross margin expansion and about 150 basis points of SG&A.
- Analyst
Okay. Thanks for the clarification. And then, Rob, PerkinElmer's obviously been on a journey for a while. I think you made a distinct point to say, look, you're not trying to be all things to all people. You want to focus in the four key categories where you think you can be a real leader in your markets.
And I'm just curious as you've done the analysis and thought about the strengths that you want to have as a Company and the leadership positions, how does -- is it about throwing more money at some of these categories? Is it about being smarter in some of those categories?
Is there more you could do from a business development standpoint? Maybe divesting out of certain assets and utilizing those funds to invest more via M&A to increase your competitive position? Just kind of curious internally how you come to the decision to jack -- to boost the R&D spending?
- Chairman and CEO
First of all, I think it's all of the above. Some we have more control over than others. So some of the more attractive areas or areas we have stronger positions, we'd like to be more active on the business development side or M&A side, but again, that's hard to predict. So we'll continue to look there. But in the meantime, we'll try and control the things we can control, and so some of that is where we see opportunities to invest, we want to be able to do that.
As I mentioned before, this is always going to be a balance for us. It's going to be rare in a situation where we come out and say we're not going to grow margin or EPS at all. But I think we're constantly trying to walk a balance between making sure we're returning cash to the shareholders and expanding operating margins, but at the same time investing in those areas that we think have great long-term prospects.
So it really gets down to focus and prioritization. One of the things I was trying to lay out earlier is to say, look, I think your going to see a much more differentiated and focused investment profile at PerkinElmer going forward. And I think the four areas that I identified are ones that are clearly getting a disproportionate part of the investment, and for the foreseeable future, I think that will be the case.
- Analyst
And just one last one on that, a bit of a follow-up. You mentioned, Andy, I think 50% of your cash flow to buybacks. Should we assume, is there anything in the pipeline that you think could happen from an M&A standpoint, and should we assume that those four categories that you listed is where you'd be most interested from an M&A standpoint as well? Or is there a chance you'd go to a new pillar?
- SVP and CFO
I think that's right. This is half our free cash flow. We still have, as I mentioned, we're at 1.7% net debt to EBITDA, so we still have some leverage as well, and we think we have a number of things in the pipeline. So I would say, it's really no different than any other time we've gone into a year.
Operator
Thank you. Our next question is from Ross Muken with Evercore. Your line is open.
- Analyst
I'm just going to touch quickly on a question that's was sort of just asked. But as you think about the sort of transformation of the asset, and it's very clear you're kind of prioritizing growth here, and that obviously makes sense, given what longer term drives value. I guess as you've seen some of the transactions already year to date in the market, within or around some of the areas that you play.
I guess when you think about your ability to execute at least something moderately larger, because it's been a bit of time since we've seen you do something more than a small tuck-in, is it always price? Is it a debate internally on fit? Is it maybe not the right time?
I'm just trying to get a sense for, again, given just the multitude of stuff that we've seen. I'm not asking you to comment on anything specifically as you think about the various reasons. And then what's likely, in your mind, to change to allow you to maybe do something a little bit more substantial, or are we okay with sort of just the small tuck-ins?
- Chairman and CEO
I would say first of all, it starts with strategy and fit. When we think about our acquisition pipeline it's -- we set forth our priorities or what our highest priorities are, and then we look for the assets that will continue to build our capabilities in those applications or end markets that we think are most attractive and fit best with our strategy. So I think it starts there.
Then of course, if you decide the strategic fit, it then gets to the valuation and can we get good financial returns. And of course, one of the things we're always looking at is the alternative is either to invest back in the Company, or quite frankly, invest in PerkinElmer by buying back stock. That's the process that it goes through. But clearly it starts with a strong strategic fit and attractive assets.
As you point out, I think going forward, I think we've said this for some time, probably the more likely scenario is we do more sort of bolt-on transactions and maybe bolt-ons by their nature hopefully get bigger. But as I think when we look at the opportunity or the alternative to do something larger, either because of fit, strategy, or valuations, we don't see much out there, quite frankly.
- Analyst
Makes sense, Rob. And maybe I could just sense from the degree of the questions, obviously maybe modest disappointment on sort of the 8% FX neutral growth. It seems to me in this environment that's a reasonable outcome given the investments.
I guess as you think about the go forward -- I'm not asking for specific long-term guidance, but one would think, again to my prior point, the investments you're making should ultimately yield better top line, and then, hopefully, then more margin expansion. So I guess as you think about the next few years, obviously going forward, clearly your goal is to be at a materially higher earnings growth rate, correct?
I guess when you were debating this with the Board was the trade-off, yes, we may be less on currency neutral this year, but the hope is this will yield a better outcome than where we were maybe prior to these investments going forward?
- Chairman and CEO
Yes, absolutely. I think the goal is that we make some investments this year but that puts us in a stronger position going forward. And so the thought here is that as you go out a couple years, both the top line and the corresponding EPS growth accelerates. And so that's the purpose of sort of taking it up.
So again, it was just some significant opportunities we saw in the marketplace, and we think now's the time to make the investment. And even though, let's say, relative to our historical track record, the EPS growth is a little lower. We think it's the appropriate investment to make, and over time we think this will yield significant financial returns and a stronger Company.
- Analyst
Makes sense. Thanks, Rob.
Operator
Thank you. Our next question is from Dane Leone with BTIG. Your line is open.
- Analyst
Hi, thank you for taking the questions. Just a point of clarification in terms of the commentary. Do you guys consider 3% mid-single digit growth or low-single digit growth?
- Chairman and CEO
Generally, the way we think about it we would say 4%, 5% and 6% is mid and 1%, 2% and 3% is low.
- Analyst
Okay. So kind of in that context and in line with some of the other questioning on the call, how do you think about the natural growth rate? You guys have been kind of on that mid- to low-single digit rate for a while now. Arguably, by comparison other peers in your group have put up some higher growth even despite being considerably larger.
Do you feel that you might just be kind of investing in structurally lower growth markets and maybe you need to kind of consider or reconsider where you're kind of focusing over the long term for exposure?
- Chairman and CEO
I guess I would maybe initially take exception to your premise. So I guess, if I look back six years, I can only think of one year where we grew less than 4%. So I would say five of the last six years we grew mid-single digits.
- Analyst
Okay. Do you think that kind of 4% is the right growth rate?
- Chairman and CEO
I think you've got to look at first of all, if you go back a couple years it was higher than that, but I think you also need to consideration is. If you look over the last couple years, I'm not sure the macroeconomic environment was one that when you look across the globe, particularly lately in the emerging markets has been a little challenging.
Of course, 28% of our revenue, and this is something we worked on because we think longer term, it's got strong prospects, but with 28% of our revenue in emerging markets, places like Brazil, Russia, et cetera, has created a little bit of a headwind. Actually, I feel pretty good with despite what we've seen in some of the challenging macroeconomic environments that we've been able to put 4% organic growth up, feel pretty good about it, quite frankly.
- Analyst
Okay. So in terms of the growth rate, do you think that -- do you think 19% without the FX adjustment is the right operating margin if we look to 2017 now?
- Chairman and CEO
Well, I don't know that we want to get into sort of forecasting 2017 or 2018 or 2019. I think what we've said is here's our forecast for 2016. I think going forward, our expectation will be -- we'll continue to invest, but we'll get hopefully good gross profit and gross margin expansion. And again, we've set a goal out there by 2020 to be at 22%.
- Analyst
Okay. Thank you.
Operator
Thank you. Our next question is from Bill Quirk with Piper Jaffray. Your line is open.
- Analyst
Good afternoon, everybody.
- Chairman and CEO
Good afternoon.
- Analyst
First question, Rob, can you help us think a little about the academic market in Japan? What are you seeing? Are we starting to see any funding shake loose?
- Chairman and CEO
The academic market in Japan has been challenging for us, probably all of 2015. I was there a little while ago, and I would say I'm not optimistic we're going to see a big turnaround there any time soon. I would say maybe the back half. I would say the only thing that's potentially happening is the comparisons obviously get easier this year. So maybe we'll see some release of some funding. But I think it continues to be challenging.
I think what we're seeing in our business is the consumables still do okay, but I would say in the capital equipment area is where the challenge has been. And unfortunately in Japan, for us, it's probably more of an instrument play than it is a consumable play. So we're hopeful that we'll see some improvement soon, but I'm not optimistic at least in the first half of the year.
- Analyst
Got it. Understood. And then, you can probably categorize this as somewhat of an odd ball question but it's certainly garnering a lot of press. Zika virus? What, if we think about newborn screening, how much exposure do you have in South America, and are you guys keeping an eye on this at all? Thanks.
- Chairman and CEO
Yes, I mean, Brazil for us is not a large -- that's probably the majority of where our newborn screening business is. We're growing in Mexico. But I would say there's sort of pluses and minuses, obviously to the extent it reduces birth rates, that's not great. But I would tell you, it is increasing sort of awareness of the whole sort of newborn health and newborn screening.
So we're actually getting a number of inquiries as to sort of the opportunity to focus more and more on the newborn screening in Latin America. So it's obviously an unfortunate situation currently, but I think longer term it is raising some awareness.
- Analyst
Okay. Got it. Thanks, guys.
Operator
Our next question is from Isaac Ro with Goldman Sachs. Your line is open.
- Analyst
Good afternoon, guys. Appreciate you guys taking the question.
- Chairman and CEO
Sure.
- Analyst
There's been a lot of inquiry around M&A so far, but I was interested in maybe exploring divestitures. I think you guys probably don't get enough credit for having been proactive, modifying the portfolio over the years. I'm curious if divestitures are in any way part of the operating plan over the next few years and your goals on those financials?
- Chairman and CEO
I think as we become more focused and prioritize our investments, I think there probably will be a couple product lines that over the next year or two probably become less strategic for us. I don't know if it will be a significant amount of revenue, but I wouldn't be surprised in 2016, and probably in 2017, you see a little bit more focus on the portfolio, which will entail disposing of some of the product lines.
- Analyst
Got it. And maybe a follow-up on the organic growth side. A lot of questions around the sort of sustainable organic growth rate. Do you guys need to do M&A to hit that mid-single digit range that you aim for just in the context of the current macro? Or do you think some tuck-in M&A would be needed to get you to that mid-single digit range?
- Chairman and CEO
I don't think so. I think we look at the portfolio we have and we look at the end markets, and I think one of the things we need to do is just sort of shift the weighting a little bit. And obviously that's part of the way we're doing that is through investment.
But we have a number of our businesses and product lines that are growing well into the high-single digits and low-double digits. It's just that we've got to grow out of some of the areas that are a little bit slower to grow. We talked about it in the past. We've got a strong position in radiochemicals and radiometric detection. It's a great business. We make a lot of money.
But every year probably grows low to mid -- declines low- to mid-single digits. So we've got a couple of those that obviously put a little pressure. Over time, as we shift the weighting to the higher-growth areas, I think mid-single digit is the appropriate number for us.
- Analyst
Got it. Thanks a bunch.
Operator
Thank you. Our next question is from Dan Arias with Citigroup. Your line is open.
- Analyst
Good afternoon. Thanks for the question. Rob, just to go back to the industrials, are you able to put some numbers to the impact of what's going on in the energy sector on your GC and your ICP-MS franchises? I do appreciate that the exposure is smaller. Just trying to better understand the effect that rate closures and oil prices are having as we read what our energy guys are publishing.
- Chairman and CEO
I would say the industrial exposure for us across the Company is probably in the maybe 10% or so. It's not a huge number. If I would sort of prioritize the industrial exposure, it starts with sort of fine chemical and petrochemical.
Oil and gas is a little further down. I think where we're seeing it though, so it's not specific to oil and gas or natural resources. It's the sort of knock-off effect that I think it's having. So we're seeing the impact of some countries that are reliant on oil revenue, clearly they're pulling in. Clearly in the emerging markets, the lower dollar or the stronger dollar, is having an impact. So I think the concern on the industrial side for us is more broad-based than it is specific to oil and gas.
Operator
Thank you. And our next question is from Jeff Elliott with Robert W. Baird. Your line is open.
- Analyst
Thanks. First one for Andy here. Could you give a guidance number for free cash flow for 2016? And then, you talked about using half that on buybacks. How should we think about the pacing of buybacks during the year?
- SVP and CFO
I think for 2016, we're going to shoot for what we've always shot for, which is 1-times net income. So that will be about $300 million of free cash. This is the first year we've had a three handle on our operating cash flow.
We hope this year we'll have our three handle on our free cash flow. So that says basically $150 million in buyback. I think you'll see that through the year maybe a little bit more front loaded, but it will probably average to a weighted average share count of 111. You can kind of do the math on that.
Operator
Thank you. Our next question is from Dan Leonard with Leerink. Your line is open.
- Analyst
Thanks. I was hoping you could perhaps elaborate further on the sources of the 70 bps in gross margin expansion you're expecting in 2016? Rob, I think you made a comment about lean earlier, but I thought there might be more to say.
- Chairman and CEO
I would say a number of things we're doing, some of it is lean and the factories we didn't get more efficiency and where we'll see that is sort of expand our capacity. And then, consequently, we were looking at actually pulling some stuff that we outsourced historically in. We think we can get some savings there.
I think clearly in the supply chain, as I think we've talked about before, when we were moving a number of the factories, we didn't, probably or we weren't as aggressive on the supply chain. We're putting plans to do that. And then I think the other thing that will help is clearly the mix shift as we -- partly the new products come out. Also as we sort of focus on these areas that have a tendency to be higher growth and higher margin.
I think the combination of those will make up the 70 basis points. I would say we're assuming for 2016 very little price. And so if we can get some price that would with great, but our assumption is that price is pretty flat for us, and so it's really coming from productivity and mix.
Operator
And our next question is from Paul Knight with Janney Montgomery. Your line is open.
- Analyst
Rob, earlier in your dialogue you had mentioned the software acquisitions coming together along with your other focused M&A in life science. Can you talk about how the software business looks, like Cambridge and Spotfire, and kind of that convergence point you're starting to see?
- Chairman and CEO
I think it continues to perform well. It had a good 2015. I think we're forecasting probably high-single digits for it in 2016. And our strategy in the informatics area is that we've built some great capabilities around the abilities, for example Spotfire is a very powerful tool with data. And then, of course, we've got our electronic notebook, which is great at sort of collaborating the data. And so what we're doing now is building that bridge, because the challenge is getting access to that data easily.
We're looking to do is take -- if you think about ELN as a data repository and you think of Spotfire as the ability to give you good analytics and visualization. We're now working on that sort of in between, that gap. So our approach is to make sure that we get the right data to the right people very easily in sort of a scalable, very usable format. And we're getting a lot of receptivity around that and we're building terrific capabilities.
When we do that, it allows us to better leverage what we're doing on the instrument side and build that linkage. So we fundamentally create the informatics in the software to allow people to take data out of a repository, analyze it real well, and then we facilitate getting that information into the repository through our instrument and imaging and other capability. And we're seeing a fair amount of receptivity with the number of our customers.
Operator
Our next question is from Steve Willoughby with Cleveland Research. Your line is open.
- Analyst
Hey, guys, thanks for taking my call. It's actually Josh in for Steve tonight. Making sure I didn't miss it, did you guys provide a tax rate on the quarter?
- SVP and CFO
We did. For the year, we said flat to 2015 or 19.5%.
- Analyst
Okay.
Operator
Thank you. Our next question is from Brandon Couillard with Jefferies. Your line is open.
- Analyst
Hi, this is Sachin in for Brandon. Thanks for taking our questions. Will you discuss the strength in operating margins you saw in the period, particularly in environmental health, was it a lot stronger than we had in our model? And speaking of like the 50 bps of core operating margin expansion for the year, would you divide that up between like human health and environmental health?
- SVP and CFO
Sure. For the quarter, on the environmental health side, we saw a couple of things. One is we saw a very positive mix shift into Metcar. And we also talked about some licensing revenue very high margin. And then we also did a lot of work in the fourth quarter around some cost controls, and so I'd say that's about half and half. And again, they had a fairly easy comp from a year ago.
It is kind of the flip of that with human health, where we saw very, very strong margins in the fourth quarter of 2014, so a much more difficult comp for them. So a little bit of the comp, a little bit of the mix and some cost controls.
As far as the 50 bps, I think that it's fairly evenly split. If you look at the full year for 2015, I think both businesses contributed. I think if you move forward to 2016 and look at the margin expansion, you're going to see more of it coming out of environmental health because we're really making the investments in the human health segment.
- Chairman and CEO
If you look at the four areas that I highlighted, three of those come out of human health -- reproductive health, the emerging diagnostics and the laboratory services. So clearly, there's much more investment going back into human health this year. And so the majority of the margin expansion we expect will come out of environmental.
Operator
Thank you. And our last question is from Bryan Brokmeier with Cantor Fitzgerald. Your line is open.
- Analyst
Good afternoon. Thanks for squeezing me in. Rob, could you elaborate a little bit on the strengths, the level of strength you're seeing in the newborn screening market in the US and the benefit you might be seeing from any more -- if you're seeing any more states expanding their test menus, including anyone yet adopting LSD screening?
- Chairman and CEO
I would say first of all that the strength that we've seen historically has been more outside the US than in the US. US is growing. If you look at the strength, it continues to be in emerging markets in China and those types of areas.
What I was referring to is the number of investments that we're making in the LSDs and the DMV and those types of things, which we're excited about, but you're probably not going to see those into the US market probably until end of 2016, 2017 at the earliest. So these are investments that you're probably not going to see.
The US, the growth there is coming from our Skids platform that we introduced about a year or so ago. So like I said, we're excited about these investments. We think they continue to build out our strong position in the marketplace, but I think a number of these will not have meaningful revenue in the US probably until 2017, because generally what we're doing with these tests is probably going to [Europe] first. We'll see them introduced in Europe probably as CE-marked IVD, and then you'll see it later in the US.
Operator
Thank you. I'm not showing any further questions. I'll now turn the call back over to Rob Friel, Chairman and CEO.
- Chairman and CEO
Thank you very much. First of all, let me wrap up by again thanking you for joining us this afternoon. I want to reinforce the terrific opportunity we have to continue to innovate across our capabilities of detection, imaging, software and service to enable critical insights that will have a dramatic impact on improving human environmental health for the better. I hope you all have a great evening. Thank you.
Operator
Ladies and gentlemen, this does conclude our program and you may all disconnect. Everyone have a great day and a great weekend.