Good morning. My name is Darla, and I will be your conference operator today. At this time, I would like to welcome everyone to Merck's First Quarter 2019 Sales and Earnings Conference Call. All lines have been placed on mute to prevent any background noise. After the speakers' remarks, there will be a question-and-answer session. [Operator Instructions] Thank you. I would now like to turn the call over to Teri Loxam, SVP, Investor Relations and Global Communications. Please go ahead.

Thank you, Darla, and good morning, everyone. Welcome to Merck's first quarter 2019 conference call. Today I'm joined by Ken Frazier, our Chairman and Chief Executive Officer; Rob Davis, our Chief Financial Officer; and Dr. Roger Perlmutter, President of Merck Research Labs, who will each have prepared remarks. In addition, I'm also joined by Mike Nally, our Chief Marketing Officer; and Frank Clyburn, our Chief Commercial Officer, who will be available for the Q&A portion of the call. Before I turn the call over to Ken, I'd like to point out a few items. You will see that we have items in our GAAP results such as acquisition-related charges, restructuring costs, and certain other items. You should note that we have excluded these from our non-GAAP results and provide a reconciliation of these in our press release. We have also provided a table in our press release to help you understand that sales in the quarter for the business units and products. I would like to remind you that some of the statements that we made during today's call may be considered forward-looking statements within the meaning of the Safe Harbor Provision of the U.S. Private Securities Litigation Reform Act of 1995. Such statements are made based on the current beliefs of Merck's management and are subject to significant risks and uncertainties. If our underlying assumptions prove inaccurate or uncertainties materialize, actual results may differ materially from those set forth in the forward-looking statements. Our SEC filings, including Item 1A in the 2018 10-K identify certain risk factors and cautionary statements that could cause the company's actual results to differ materially from those projected in any of our forward-looking statements made this morning. Merck undertakes no obligation to publicly update any forward-looking statements. You can see our SEC filings as well as today's earnings release on merck.com. Finally, similar to last quarter, we have posted a presentation to the investors section of merck.com, which includes some of our highlights from the quarter. With that, I'd like to turn the call over to Ken.

Thank you, Teri. Good morning and thank you all for joining us today. We had a very strong start to 2019. And we are seeing our fundamental strategy of investing thoughtfully in R&D involving the science payoff. Our current portfolio of assets continues to drive strong growth and we are working to ensure that we capture the near-term opportunities in front of us to maintain this momentum, while planning for the next generation of treatments. Our first quarter performance with double-digit year-over-year sales and EPS growth are the results of portfolio and operational strengths driven by oncology, vaccines, and select hospitals and specialty products. We’re confident that products within these areas, including KEYTRUDA, LYNPARZA, LENVIMA, GARDASIL, BRIDION and others together with our Animal Health franchise will lead to strong growth over the coming years. Our performance in this first quarter also speaks to our success globally as we've received a number of additional approvals and launched new products in various markets around the world. Our international business, which represented nearly 60% of our sales this quarter, has strong momentum. And we believe that we've only scratched the surface in terms of the opportunity in key markets such as China, where we are seeing significant growth. We foresee a stream of additional approvals from our current portfolio of products across markets globally, and we will look to maximize these opportunities powered by our commercial team's proven ability to execute. In parallel, we are also focused on advancing our promising pipeline and continuing to augment our internal research and development efforts with external innovation. We are excited by the prospect of our pipeline, which includes potential new treatments and vaccines, oncology, HIV, and many other areas of significant and ongoing unmet needs. There is also impressive work underway in our discovery hubs…

Thanks, Ken, and good morning, everyone. As Ken mentioned, Merck had one of its strongest quarters in the recent history. Our first quarter results reflect broad based strength across our portfolio and continued discipline in our resource allocation. We executed very well across our key growth stores, and our updated guidance reflects confidence that we remain well positioned to deliver strong growth this year and in for the future. Turning to the top line, total company revenues were $10.8 billion, an increase of 8% year-over-year, or 11%, excluding the negative impact from foreign currency. This quarter was led by our human health business with growth of 12%, excluding exchange. Animal Health revenues grew 3%, excluding exchange. The remainder of my comments pertaining to sales will be on an exchange basis. The increase in human health revenues was led by key products in our oncology, vaccines and hospital and specialty businesses. Growth was strong in both the U.S. and international markets, and especially in China, where sales increased 67% year-over-year, driven largely by newly launched products, In oncology, KEYTRUDA sales were nearly $2.3 billion this quarter, an increase of 60% versus the first quarter of 2018. Growth was primarily driven by higher use in first line non-small cell lung cancer both as monotherapy and with the rollout of the chemo combo. In addition, utilization remains strong across the breadth of indications including melanoma, head and neck, bladder and MSI-high cancers. With our recent approvals and adjuvant melanoma and renal cell carcinoma in the United States, we are now approved in 18 indications across 11 different tumor types, plus a pan tumor approval in MSI-high patients. We are also very excited by recent approvals in Japan and China, and look forward to making additional indications available to patients and markets around the…

Thanks, Rob. The first quarter saw a continued progress across all aspects of the R&D portfolio. As has already been mentioned, early in the quarter we obtained U.S. approval for KEYTRUDA when used as Adjuvant therapy in the treatment of patients for the malignant melanoma with lymph node following definitive reception. More recently we obtained approval for combined use of KEYTRUDA and Pfizer's axitinib in the first-line treatment of advanced renal cell carcinoma based on the results of our KEYNOTE-426 trial. The strength of this study in which improved overall response rates, progression free survival and overall survival compared with traditional treatment with single agent sunitinib were observed led to a very rapid review with approval secured nearly two months prior to the PDUFA date. I should also note that the combination of KEYTRUDA plus axitinib yielded consistently favorable results versus sunitinib in all traditionally defined patient subgroups and irrespective the PD-L1 expression in the tumor. KEYTRUDA acts on a very broad range of malignancies. The current FDA label includes indications from SALVAGE to Adjuvant therapy while in different settings expanding 11 different tumor types with more indications currently under review. During the quarter, we also gained approval for KEYTRUDA in China when combined with platinum plus pemetrexed chemotherapy in the first-line treatment of non-small cell lung cancer. With this approval, we hope to bring the benefits of this combination regiment previously approved in the United States, the EU, Japan and other major jurisdictions for the very large population of patients in China suffering from pulmonary malignancy. We also obtained FDA approval for the use of KEYTRUDA monotherapy in patients with non-small cell lung cancer whose tumors expressed PD-L1 at 1% or more of tumor cells based on the results of our KEYNOTE-042 study. This indication broadly use of KEYTRUDA…

Thanks Roger. Darla, we'll move to the Q&A portion. We're sensitive to the rest of our peers reporting this morning. So we'll end our call just before 9 A.M. So I'd ask that you keep your questions to a maximum of one or two so that we can get as many people on the call as possible. So Darla?

[Operator Instructions] And your first question from Jason Gerberry, Bank of America.

Just two for me. First, just can you talk, Ken, maybe a little bit about the future of Merck's role as a primary care company? I know a lot of investors perceive the company is largely pivoting post genuity LOE away from primary care and becoming more of a specialty company. But you also have programs like MK-7264. So just -- if you can provide a little bit of color in terms of the company's commitment and thought process regarding being a primary care player longer term? And then just, secondly, can you guys give a little bit of color that the KEYTRUDA loan opportunity in China? A little bit more specific there would be helpful. Thanks.

Well, let me start by saying that as a company, we are focused on following the science and coming up with innovative products that make a big difference. We are not saying we're going to be totally a specialty company or vaccines company or primary care company. What we actually want to do is to make sure that we take advantage of the best opportunities. Right now, in oncology, the current growth is largely driven by that. But if you look at our pipeline, things like for example, the pneumococcal vaccines are things that are essentially primary care type products. So I would say we haven't committed ourselves to one area of medicine. It has always been helpful to us to follow the science. And we're going to continue to do that going forward.

And with regards to China -- good morning, this is Frank. We're one very excited about the overall opportunity in China as we demonstrated, as Rob mentioned, 67% growth versus prior year. Specifically with KEYTRUDA, last year we received our second-line melanoma indication in China, and as Roger mentioned, we just received our first-line lung indication with the combination with chemotherapy. We're really excited about the opportunity in China. We will be working through the NRDL listing process with the Chinese regulators. And given the timing of our lung approval, we'll have to see if NRDL listing is a possibility this year. A listing would open up an exciting opportunity to expand volumes. But even without that, we feel that we're very well positioned for with KEYTRUDA in China with the only PD-1 that has a first-line lung cancer indication. And we feel as though the breath of our program as you've seen in other markets, we plan to bring additional indications to China, which we think positions us very well for future growth.

Right. Thanks. Let's move to the next question, please.

Let's move to Umer Raffat with Evercore ISI.

I actually wanted to focus not on cancer today for a change and perhaps on HIV for a minute. I just wanted to gauge your expectations into the drive to simplify Phase 2 trials coming up this summer. I understand you have a triple of like regimen. And I guess my question really is what is it that we can learn about MK-8591 in the context of the combination pill? And what are you, specifically looking for on deciding whether to take this program forward into larger Phase 3? Thank you.

8591 has extraordinary properties as you appreciate both in terms of its potency and in terms of the duration of its effects. We have had the opportunity to present some of those data in the past, but we're now getting -- we'll have a chance to look at significant Phase 2 studies of long duration. I'm quite optimistic actually, that we're going to see very good responses in that setting in that that will lead to Phase 3 programs. Over time, I think the real advantage of 8591 -- this has ability to be put into a long-term format as potentially an implantable that could provide enormous benefits from pre-exposure prophylaxis point of view, but as well, dramatically simplify the treatment regimen for patients who are already infected with HIV in order to achieve long-term viral suppression. So we're going to be looking at those results of Phase 2 results very soon and have the opportunity to present them. And I think that will lead to much larger studies. And we're quite enthusiastic about 8591.

Okay. Thank you. We'll move on to the next question please, Darla?

It's from Chris Schott with JP Morgan.

I guess, just two here. Maybe first, can you just elaborate a little bit more on KEYTRUDA in front-line lung, as you think about Europe? Just, where are we at this point in terms of reimbursement and market share? And how should we be thinking about kind of the ramp in that first-line lung business as we go through the rest of this year? My second question was just trying to get a better handle on longer-term margin dynamics. Can you just elaborate a little bit more expense trends over time? I know specifically, you've talked about R&D investments this year and next. But we think longer-term -- can we think about expenses actually rolling over beyond 2020 starting decline or is the longer-term margin opportunity more about expenses this growing at a slower rate than top line? Thanks very much.

With regards to KEYTRUDA outside the U.S. and Europe, in particular, first, we're very pleased. We sold close to $985 million this quarter and had growth of almost 69% versus prior year outside the U.S. So we're very pleased with our progress. In lung, specifically, lung represents about 70% of our sales outside the U.S. We have access right now in Germany and many of the mid-European markets. We're still working on access in several of the other large European markets for reimbursements, which we expect will come on line hopefully in the second half of this year. So our overall momentum where we have first-line lung approval for monotherapy is very strong with a leader clearly in lung, in that setting. The chemo combination has helped us to ramp, as I mentioned. And we have market leading shares in the markets -- in Europe there and then look forward to the second half of the year where we'll see additional reimbursement additional markets come onboard for access. So we're very pleased with where we are in Europe and outside the U.S. with regards to lung.

And Rob, can you comment on margins.

So with your question on margin, maybe just an overall comment then the specifics on what's happening in the operating expense line. We have said and we continue to believe we do expect meaningful operating margin expansion over time driven by revenue growth, the changing mix of our business, our continued focus on efficiencies and ultimately a moderation of R&D growth over time. So I just put that up there as to set context with, specifically when you look at what will be driving the margin expansion into your question. We will continue to see R&D grow over the next couple of years and we would expect that to be at a rate faster than sales. But after that, we do expect to see R&D moderate. It will still grow. And our overall OpEx we believe will continue to grow. It just will be growing at rates slower than sales that should allow for the margin expansion we've been talking about. So it's not that we expect absolute reduction in spend, but just a moderation of growth as we move through the bolus of investments in the really expansive and frankly impressive clinical program that our MRL colleagues have put together in the near-term here.

Let's move on to the next question please.

It's from Navin Jacob with UBS.

If I may, on KEYTRUDA, the administration will be or the OMB putting out the regulations on or draft guidance on IP. I just wondering to the extent that you can share with us what the average net prices in the Europe relative to the net price here in the U.S.? Is the administration's characterization of EU to U.S. pricing differential of -- or U.S. to EU pricing differential of 1.3 to 1. Is that fair? And then number two, just on the China market, how large is KEYTRUDA right now, roughly analyzing in China that'd be very helpful to us? Thank you.

Yes. So on the first question, this is Frank, with regards to KEYTRUDA, we're really focused on our overall strong underlying demand in the U.S. and outside the U.S. in our strong data. We haven't shared with regards to net pricing outside the U.S. With regards to China, we see the opportunity as very significant. If you look at the lung market in particular, the 600,000 to 700,000 lung cancer patients in China, half of them have a driver mutation, and we think a couple hundred thousand of those patients are available for treatment with our overall KEYNOTE-189 regimen. So we see China is a very significant opportunity of growth going forward. And we're very pleased that we're rolling out our new lung cancer indication.

Thanks, Frank. We'll move on to the next question please, Darla.

It’s from Vamil Divan with Credit Suisse.

So one, maybe just on the lung side, you mentioned the KEYNOTE-042 approval. Can you may be just quantify sort of your expectations on the use of monotherapy in patients with PD-L1 between 1 to 50? And then also the stage three opportunity, I think, maybe because people may surprise with that label expansion. So if you can talk about the commercial opportunities there? And then maybe, Ken, just building on the earlier question around primary care and sort of business development priorities. Can you maybe just comment broader on sort of the size of deals that you want to focus on the science? I think a lot of investors also curious on just as you think about bolt-on versus largest transactions? Or any changes in your priorities there?

All right. Let's start with Frank.

So KEYNOTE-042, we see as a very positive advancement for our position in non-small cell lung cancer. As Roger mentioned, our new indication is based on -- for patients who are not candidates for surgical resection or definitive chemo radiation. So it gives us an entry in the Stage 3 patients. It's a smaller subset of Stage 3 patients based on our indication, but an important indication for us to expand into non-small cell lung cancer. The other aspect of 42 does allow us. It allows to bringing all PD-L1 positive patients in the metastatic setting that would look for a monotherapy option. And there are patients that look for monotherapy options may be based off of their performance status or other co-morbidities. We see this as an important opportunity as well. So we're very pleased that KEYNOTE-042 helps to round out our overall lung story and positions us very strong for future growth in lung.

Okay. And on the business development side, I would just say that, first of all, last year, we were very active. We did about 60 transactions spanning licensing, technology deals and clinical collaborations. As we said before, our goal is to find the best scientific opportunities that we can. Our balance sheet gives us the opportunity to look across the entire spectrum of opportunities. But we've also been very clear that while we look at everything, what most appetizing to us are the bolt-on deals because we believe that the least disruptive thing from an R&D standpoint. I would also comment that while the end of last year, we felt valuations were going in the right direction with the first quarter 2019 market recovery, assets being more fully valued. And as we look forward, we continue to say we have to be disciplined and look for those opportunities where we can create value going forward. Thank you.

Thanks, Ken. We'll move on to the next question.

It's from Andrew Baum with Citigroup.

I have two questions, please. The first one for Roger on V114. I'm simplistically wanted to say, well, your competitor is in market experience that has a great number of stereotype areas, precious for replacement strains. And so I underline the word simplistically. But what is that you believe Merck brings to the table apart from speed to market, which you think is going to make sure that Merck is a major participant both pediatric and adult segments? And then second, in relation to the IPI proposals, and this is addressed to Ken or Frank. What do you think is the ultimate impact of IPI given the ability to negotiate in Europe provides nontransparent discounts but increased lift? Because what is the complexity of -- attacks this pricing the 340B hospitals? How does that all shake out? And do you think it's actually feasible to find a solution that works?

Let's start with -- thanks Andrew. Let's start with Roger on V114.

So first of all, we're not inexperienced in the pneumococcal disease market. And we have had pneumovax on the market for decades. This is an area that we know extremely well. The pneumococcal conjugate vaccines have been in development for more than 20 years in our laboratories. In fact, I started these programs through my first tour of duty long time ago. And so we've learned a great deal about how to make these vaccines and make them very efficacious. And particular, we've learned about balancing stereotypes in order to provide the broadest possible response. Over time, our program, which includes not just V114, but others as well, will become an important contributor to human health and protection from pneumococcal disease -- invasive pneumococcal disease both in adults and in the pediatric population. So you'll see that evolve over a period of years. It's going to be an important contributor, no doubt.

On the international price index situation, so we have, first of all, we submitted our comments. We continue to see that it's not the best approach to dealing with the major problem that we have with patient out-of-pocket cost. I think we are much better approaching. I think it's still early days. I don't know exactly how these kinds of things will be implemented a number of proposals out there, as you know, involving healthcare reform in this country. I would say that we negotiate as much as we can in ex-U.S. markets for the value that we believe that we can bring. And I don't think anyone's opposition that -- by doing that, it's going to improve our ability to negotiate in Europe is really the right thing. Finally, I would say that we've looked at some of the calculations in the report about KEYTRUDA. We're not sure it's actually the right one, but I will tell you that that we continue to focus on the strong data that makes KEYTRUDA a unique product across many indications.

Right. Thanks, Ken. We'll move on to the next question.

It's from Steve Scala with Cowen.

A couple questions. KEYTRUDA numbers were impressive, but a touch below expectations. Just wondering if there were any one-time factors that impacted the Q1 number? And secondly, on gefapixant, it looks like an effective drug and a safe drug, but I don't believe the Phase II data in OA or OA pain ever was presented neither were other smaller studies that completed sometime ago. So can you elaborate on the data set supporting gefapixant? Thank you.

Right. We'll first go to Frank on KEYTRUDA.

Yes. So KEYTRUDA sales, as we've mentioned, were $2.3 billion this quarter of 60% growth year-over-year as exchange. And what I tend to look at is what's happening from an underlying demand perspective. And when you look both versus prior year and sequentially, we're seeing very good continued underlying demand. You will see quarter-to-quarter some fluctuations based on some inventory movements. But overall, I think that we feel very good about how we're seeing the demand ramp. And in particular, we're seeing strong overall demand with regard to our lung cancer indications both in non-squamous claims and squamous cell carcinoma non-small cell lung cancer. In fact, in squamous cell lung cancer, we're seeing our market shares exceed 75% for new patients. So we've become the standard of care in that subset of patients. We also are feeling very excited about the opportunities outside of lung. In the U.S., as Roger mentioned, we have our new indication now based off of KEYNOTE-426 and renal cell carcinoma. We see that as a very significant opportunity for future growth. As well as Roger also highlighted KEYNOTE-48 with a PDUFA date coming up in June, for head and neck cancer, and we have market leadership position in head and neck and later lines of therapy. And we're very excited about KEYNOTE-48. In addition to lapping, I mention is outside the U.S. as we've been saying, we see significant opportunities based on some of the continued rollouts in Japan and China and in Europe. So we're very confident about the KEYTRUDA ramp and feature growth prospects going forward.

Thanks, Frank. We will move to Roger.

On 7264, it makes sense that the underlying logic of this is the belief based on a variety of preclinical studies that the purinergic receptors, and particularly P2X3, contribute to a neuronal hypersensitivity syndrome. So in the setting of chronic stimulation, there's sort of a feed forward phenomenon. And it contributes to Angelin and other sensitivity syndromes. That's true. We believe, in the first case, in the chronic cough setting where an early stimulus, usually result of inflammation leads to a cough syndrome that does not resolve after eight weeks. And in that setting, as we've demonstrated in Phase II studies, gefapixant has dramatic effects, but as well in some other chronic stimulation syndromes. And we're looking at a number of those, including, as you know, endometriosis, there's a lot of preclinical data that supports the conjecture, but fundamentally, we need better clinical data. And that's what we're going to get.

Thanks, Roger. We’ll move like to the next question.

It's from Geoff Meacham with Barclays.

Frank, I want to ask about lung trends in the U.S. When I look at brand impact data shows first-line share that stable at around 60% in 1Q. So the question is -- are you seeing any moderation and sequential share gains in the U.S.? And where do you think the ceiling share could be in first line lung? And the recent immune design deal, Roger, can you talk me to more broadly about how you can leverage the technology optimally and now that it's in-house? And how do you guys view a new engine and approach and IO more broadly? Thank you.

All right. Let's start with Frank.

Geoff, in the U.S. and lung, we're seeing is with regards to share, you have to take out patients that do not have EGFR or ALK genomic tumor aberrations. So we see our market shares somewhere in the low 70% share for the non-squamous non-small cell lung cancer segment. So we see very strong penetration, Geoff, within PD-L1 positive patients. The 15 above segment which we're pretty much getting all of those patients in the 145, we have penetrated very significantly. We still have opportunity for growth in the PD-L1 negative patient population. And that's a focus for the commercial team. So I do see that as being the opportunity we'll continue to educate, in particular the community physicians in the U.S. with regards to lung. As I mentioned with regards to the squamous non-small cell lung cancer patient population, we have penetrated that very rapidly over three quarters. Those patients are now being treated with a chemo combo regiment or with monotherapy. So we still see growth for squamous, but clearly we have penetrated that segment very rapidly. And as I mentioned before, we are very excited not only about lung, but all the other indications that I spoke about, and Roger spoke about that are upcoming new launches for us in the U.S.

Thanks, Frank. We move to Roger for immune design.

So in immune design, there were two principal assets and both of high interest to us. I mean, the first is the molecular defined Adjuvant -- Gilead Adjuvant, which we believe could be beneficial for some of our newer vaccines that require Adjuvant and as well for some of the older vaccines where there's a design to get to less of a fewer -- a smaller number of vaccinations. So we're looking at those things very carefully. The Adjuvant has been in thousands of people. And so we already understand its safety profile quite well. So that's good. And the second thing is the lentivirus vaccine, which is unique from several perspectives. The first is its selective targeting of dendritic cells. The second is its high carrying capacity. And the third is that it has already a substantial amount of clinical exposure demonstrating that it actually stimulates an immune response. That can be applied to neoantigens, but it can also be applied, as they have, to more conventional cancer testis antigens, which are often forgotten about. But I think may -- someday have their day in the sun. So we're looking forward to pursuing those kinds of approaches in the combination with other immune modulators that we've already developed.

Thanks, Roger. We'll move on.

Your next question from Alesandra Chen from Cantor.

So my first question is on China. And do you think that individual drugs have blockbuster potential? And if so, what has to change in the market for this to happen? And then just a follow-up question on V114, if it's approved, what is your go-to-market strategy you might have competition that's in the market now and potentially coming? For example, will you target children first and then go after adults? And then what do you anticipate the ACIP recommendation maybe? Thank you.

We'll start with Frank in China.

So with regards to China, we see China is a very significant opportunity for us. As we mentioned, we're seeing very strong growth. And I think, for us, what's important is we have pivoted to innovation in China. And this has always been a part of our overall strategy at Merck. So when you think about the launches right now in China of GARDASIL, of KEYTRUDA, LYNPARZA, LENVIMA, BRIDION, JANUVIA has just now received an NRDL listing. We see significant opportunity for China across a number of products within our innovative portfolio.

Right. Thanks. We move over to Mike Nally for V114 outlook.

When we think about V114 and the opportunity going forward, we think there's a great opportunity in both the pediatric and adult segments. Obviously, we've had a presence in the adult segment as Roger noted within Pneumovax 23 for over 35 years. And as we think about the pediatric segment, clearly, we were touching all pediatric offices basically around the world with our existing vaccines. And so when we look at the opportunity for 114, a lot of it comes down to really understanding the underlying epidemiology and how that's evolving over time. With 114 at a market level, that is different, but also across pediatric and the adult segments, the epidemiology is evolving quickly. So as we think about the ultimate recommendations, it's clear that customers want choice in this market. And with 114, we think we provide a really valid alternative, especially given the fact that we have a very balanced immune response across all 15 stereotypes that we're covering in our vaccine. And what we're seeing today is that there are some stereotypes that are inadequately covered. And we're seeing breakthrough with those from the existing vaccines.

Thanks, Mike. We'll move on to the next question, please.

From David Risinger with Morgan Stanley.

I have a couple questions. And if I repeated anything from -- repeating anything, I apologize. First, with respect to Animal Health, the constant currency growth was 3%, including 1% in livestock. Was the issue in livestock just at the end of the quarter in the U.S.? I think that you know, there were the Midwest floods and other weather issues at the end of the quarter, but I don't know if there were other things that held back the livestock business. And I think that you said that for the full year you expect growth to be greater than the market for Animal Health. What is the market expected to grow in 2019? And then separately, could you just quantify the inventory swings for KEYTRUDA in the first quarter, and for Gardasil, if there were any for Gardasil? Thank you.

Thanks. We'll start with Rob on Animal Health.

As you look at what happened with Animal Health in the first quarter, your numbers are quoting are correct. And really what we were seeing is an impact of the cold weather. It's not necessarily the flooding that went through the middle part of the country. It's really more due to the cold weather patterns, which cause the cattle to stay in the fields longer and not move into the feedlots as quickly. And given that a lot of our products are more focused to the feedlots that mix dynamic of just how it played out affected us in the quarter. So that was part of it. We also then just see some buyout from our distributor partners due to some consolidation going on in the distributor space. So it was really a combination of a change in channel and by down to pull down inventory in the channel and the seasonality impacts that affected the business in the first quarter. As we look to the full year, we do expect to grow above market. And if you look at where the Animal Health market has been over the last couple of years, it's in the roughly, I would say, low to mid-single-digits of growth. So we expect to outpace that, and as before, we layer in the impact of the Antelliq acquisition.

Pass over to Frank for KEYTRUDA inventory.

And with regards to KEYTRUDA, as I mentioned, with the brand that is now of this size, you're going to see some slight movements with regards to channel quarter-to-quarter. We're focused, as I mentioned, really on the strong underlying demand that we're seeing in our major indication, as well as the future indications we're prepared to launch.

Right. Let's move on to the next question, please.

It's from Alex Arfaei with BMO Capital Markets.

Frank, a follow-up if I may on the KEYTRUDA opportunity. In China given that it sounds like it's going to become increasingly important. As I'm sure you know there are Chinese companies that are also working on PD-L1, some of them moving to late stage. And these could compete with you on price. So as you look at China longer term. What's the outlook and from a competitive perspective in immuno oncology. And do you also see a future where these PD1s compete with KEYTRUDA in the U.S. and developed markets? And if I may, could you provide your estimated KEYTRUDA sales by indications in major markets? Thank you.

So on the -- let me start with the estimated sales in the U.S. by indication. We usually provide that out. So 65% of our sales in the U.S. are lung, 10% are approximately melanoma, and neck represents about 5%. And as I mentioned, we're very excited about the opportunity we have upcoming in head and neck, bladder represents about 5%. MSI-High is become a very important indication for us represents about 5%, and all others approximately 10%. Going back to your question on China, we believe oncology is really a data-driven area, Alex, given the severity of the disease. If you look right now what's been accomplished with KEYTRUDA, and we've always said that this wall of data is going to be important. And I think it's going to be very important for us in China as well. When you think about 18 indications across 11 different tumor types, we believe that this continues to differentiate us in the marketplace. China will clearly be a competitive market. But our first mover advantage with the first-line lung cancer approval, we think sets us up very well. And the local players in China do not have an approved indication right now in first-line lung nor have they conducted or achieve the results of a trial like KEYNOTE-189. So our strategy as we've seen in the U.S. right now, there are five additional competitors there. And we believe our clinical execution and commercial execution and our significant amount of data will help us to compete in China as well as any other market around the world.

Right. We're going to try to get at least one more, and if we can squeeze it in.

It’s from Tim Anderson with Wolfe Research.

Just a broader question on China in general, big growth in the quarter, but they've implemented certain policy changes like this four plus even tendering process yet a lot of industry participants think is going to slow down overall Chinese growth for multinationals. What is your outlook for that for Merck's overall book of business? The second question is KEYTRUDA. The triple-negative breast 522 has been trial system update. Are we likely going to see data this year? Is that still possible? And if it is, is that just going to be PCR? Or could we actually see clinical efficacy being reported out? Thank you.

All right. So we'll do Frank comment quickly on China; and then Roger on 522.

So as I mentioned in China, for us, we have pivoted to more of the innovative products that are driving our growth Gardasil, KEYTRUDA, BRIDION, LYNPARZA and LENVIMA. So we feel that we are very well positioned, and that's going to help us to continue to see growth. We will likely see some impact from some of the older products based on some of the pricing initiatives that are underway in China and some of the provinces. So while we may see some bumping us along the way, we have shifted the majority of our portfolio. Approximately 60% to 70% of it is now is focused on innovative products. So we feel as though that positions us very well not only in the near-term, but for the long-term growth in China.

Real quick one on Slide 22.

On Slide 22, yes, of course, the study is supervised by an external data monitoring committee, and they will be evaluating that it's event-driven. My expectation is that it is possible for sure that we could see some review from them. There was a previous interim which led to the study continuing and our expectation is that there will be an opportunity to see additional data. But I can't speak to what those data will be. And as soon as we know, we'll have the opportunity to announce it. That's basically they're in control.

So thank you for joining the call today. We are executing well across our business and we remain confident in our performance for the year and the long-term. We look forward to discussing our pipeline and business in more detail at our Investor Day in June. Thank you.

This concludes Merck's first quarter 2019 sales and earnings conference call. You may now disconnect.