Ladies and gentlemen, thank you for standing by, and welcome to the PTC Therapeutics Fourth Quarter and Year-End 2019 Financial Results Conference Call. At this time, all participants are in a listen only mode. After the speakers' presentation, there will be a question-and-answer session. [Operator Instructions] As a reminder, today's program may be recorded. And now, I'd like to introduce your host for today's program, Alex Kane, Head of Investor Relations. Please go ahead, sir.

Good afternoon and thank you for joining us to discuss the PTC Therapeutics 2019 fourth quarter and year-end corporate updates and financial results. Joining me on today's call is our Chief Executive Officer, Stuart Peltz; our Chief Operating Officer, Marcio Souza; and our Chief Financial Officer, Emily Hill. Before we start, let me remind you that today's call will include forward-looking statements based on current expectations. Please take a moment to review the slides posted on our Investor Relations website in conjunction with the call, which contains our forward-looking statements and other details shared during this call. Our actual results could materially differ from these forward-looking statements, as any and such risks can materially and adversely affect our business and results of operation. For a detailed description of applicable risks and uncertainties, we encourage you to review the company's most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission, as well as the company's other SEC filings. We will disclose certain non-GAAP information during this call. Information regarding our use of GAAP and non-GAAP financial measures and a reconciliation of GAAP to non-GAAP is available in today's earnings release. With that, let me pass the call over to our CEO, Stuart Peltz.

Thanks Alex and thank you for joining us this afternoon, as we provide our update for the 2019 fourth quarter and end of year review. Significant progress was made across our platforms and programs in 2019, which has continued in 2020. Our vision is to continue to grow as a diversified rare disorders company, with multiple science platforms, with the goal of at least $1.5 billion in revenue by 2023. PTC's recent transformation has been remarkable to experience. Over the past five years, we have transitioned from a single-product company with Translarna to treat nonsense mutation Duchenne muscular dystrophy patients to accompany with two Duchenne muscular dystrophy products, Translarna and Emflaza to where we are now. We are now selling four products globally and have the capabilities to bring therapies to patients in 50 countries. With potential approval for risdiplam to treat SMA patients in our gene therapy for AADC deficiency, our commercial portfolio is expected to further expand. Our pipeline is also expanding across multiple scientific platforms, which will continue to drive innovation and lead to value creation. Let's start with our splicing platform. We recently presented the full results from our successful SUNFISH part 2 pivotal trial. This trial enrolled the broadest population of Type 2 and 3 SMA patients ever studied and more closely represent the type of patients that physicians typically see in practice. Importantly, the vast majority of Type 2 and 3 patients are not currently on disease modifying treatment. The positive and statistically significant results observed in this trial confirmed the potential of risdiplam to be the most competitive global product for a broad range of SMA patients. SUNFISH part 2 studied non-ambulant SMA patients, two to 25 years of age without any limitation to their motor function capabilities as evidenced by their baseline…

Hey, thank you, Stuart. Let me start with the commercial side of the business. Our DMD franchise remains the foundation for our growth. For Translarna, there is growth potential from multiple ongoing efforts. We expect increased penetration in existing territories, including Brazil for which recently received ANVISA approval. Geographic expansion into new territories increased disease awareness and early diagnose will also contribute to growth moving forward. For Emflaza, we expect continued positive momentum with new patients and those switching from prednisone. With the recent label expansion, we are now able to treat all DMD patients two years and older and continue to increase treatment with Emflaza in these younger patients. Our PTC cares team is actively engaged with physicians and payers to ensure that patients receive access to treatment as quickly as possible. Emflaza's clinical differentiation is further supported with new data recently published in the Journal of Comparative Effectiveness. In that study, treatment with deflazacort was associated with a more than two-year delay in loss of ambulation relative to treatment with prednisone. In addition the onset of complications like scoliosis was significantly delayed among patients treated with the deflazacort versus prednisone and further functional benefits were observed in deflazacort patients. The data also demonstrated the positive risk-benefit of switching deflazacort from prednisone. PTC continues to leverage our strong Latin America infrastructure to support ongoing and upcoming launches. The TEGSEDI launch continues to trend well with hundreds of newly diagnosed patients genetically confirmed through PTC-supported programs. We are finding and treating new patients and due to the hereditary nature of the disease. The process is likely to accelerate in the future. As a reminder, TEGSEDI was the first-approved hATTR silencer treatment for Stage 1 and 2 polyneuropathic adult patients by ANVISA. There are an estimated 6,000 patients with hATTR in…

Thank you. Marcio and Stuart outlined our several development and commercial products that place us in a strong financial position to have revenues and royalties that fund our ongoing innovation to drive us toward our $1.5 billion target in 2023. We made good progress towards that goal in 2019. The press release issued earlier this afternoon summarizes the details of our fourth quarter and year-end 2019 financial results. And I will take a few minutes now to review key details for the year and our guidance for the full year 2020. Please refer to the press release for additional details. Starting with our top line results. We reported $307 million in combined net revenue for the full year 2019 compared to $264.7 million for the full year 2018. This includes a $15 million milestone payment at PTC from Roche triggered by the acceptance of the risdiplam NDA. Translarna net product revenues were $190 million for the year, compared to $171 million for the full year 2018. This growth reflects the expanded commercialization of Translarna. As a reminder, Translarna was the first therapy approved in Brazil for DMD last April with a near-term price impact, which should in long-term expanded market access. For Emflaza, we reported net product revenues of approximately $101 million for the full year 2019, which compares to $92 million for the full year 2018. Emflaza sales were impacted by an increase in the utilization of Medicaid, which changed our gross-to-net assumptions and the transition to a new specialty pharmacy distributor. These factors impacted Emflaza's sales in the third quarter of 2019 in particular and we saw improvements in the fourth quarter that have continued through early 2020. Total DMD franchise net product revenue was $291 million for 2019 and we anticipate full year 2020 DMD franchise net…

Certainly. [Operator Instructions] Our first question comes from the line of Alethia Young from Cantor Fitzgerald. Your question please.

Hey guys. Thanks for taking my question and congrats Stuart on the progress over this last quarter. I guess I just wanted to maybe ask you two questions. One, just kind of wanted your perspective on how you guys kind of think about the risdiplam data as it relates to maybe the FIREFISH upcoming readout which some may believe may lead to a more comparable data set of sorts? And then the second one just is can you talk about the synergies between Friedreich's ataxia and gene therapy and with the readout platform please?

Sure. Thanks Alicia. Thanks for the question. I think from the perspective, yes, I think you're absolutely right in terms of the notion of the SUNFISH trial that we recently had data. That was a very broad trial with patients two to 25 years of age with a very broad inclusion criteria. So, it's much likely the pacing population that physicians really see day-to-day in their patients. So -- and we did that on purpose because that's what we wanted to see how the drug would function in that line. And obviously we saw a one and a half points different that was statistically significant, so we're pretty happy with that. In terms of the FIREFISH, I think that's probably in some ways a more homogenous population although there are differences, but I think you saw even in part 1 how well does the plan functions and even in comparison, you can see that it did quite well. And so my perspective was really sought to be the most competitive drug there. We anticipate for part 2 the same event. We already said that it was statistically significant. And that we expect as you'll see coming up in the -- in AAN the results of that more clearly and so we're excited about that. And I think you'll be able to more clearly have a little better comparison when you say how well did we do versus other drugs. So, I think that's probably -- while nothing is absolutely perfect in terms of apple-to-apple, that's probably as close as you can get. I think you'll see that risdiplam will do quite well. In terms of FA both gene therapy and the drug. One is obviously gene therapy that will be directed into the -- directly into the brain whereas the other one us systemic molecule different mechanism maybe Marcio wants to go through a little bit.

Absolutely. Thanks Stuart. Hi Alethia. Thanks for the question. So, what we mentioned before right that our interest as a company, our goal at the end of the day is to treating our patient. When you look into disease like Friedreich's ataxia, you have a component that is systemic, specifically for this amongst many others the heart is fairly affected and then you have the deterioration -- neurotic deterioration that occur with the patients over time, specifically in their teenage years and later. What you're looking into with the two modalities really to try to address, most if not all of the issues these patients went through by injecting directly into the dentate nucleus of the cerebellum, we expect to stop the progression of the disease and hopefully, it will start some function there neurologically. And by giving 743 would have a more systemic measure including the heart. So we see both approaches quite complementary. They are in similar development time lines, although 743 is more advanced in terms of the stage of the trial. So when we start the trial later this year including rolling that about 100 patients, we expect that after one year the result would be pivotal trials. So we should be able to register 743 before our gene therapy candidate.

Great. Thank you.

Thank you.

Thank you. Our next question comes from the line of Joe Thome from Cowen and Company. Your question please.

Hi, there. Thank you for taking my question. The first one is on the aniridia data that were presented today. I guess, do the placebo arm perform as you would have expected with that 3.3% change? And is there anything different about sort of the patients that did respond to Translarna therapy and those that didn't in terms of your current disease severity? And then one more on – a follow-up to the first question in Friedreich ataxia. In order to use the two products in combination if they are can we – control mechanisms, do you have to study those in a formal clinical study or just achieve independent registration? Thank you.

Yes. Thanks Joe for the – of the question. Maybe the first one on aniridia let me just say that, you're pointing at what we expect in sort of – in a way we didn't know necessarily what to expect. And this was the first trial really ever done in aniridia in terms of following. And so the real natural history and understanding of the disease wasn't all that well understood. And in fact we initially have the trial since it was sort of an early trial via safety study compared to placebo as a treatment. And we just thought that so that retains – still looking at mRNA [ph] to be able that if we saw something that we'd be able to go and talk to regulators. But I think at the end of the day I think – at the end of the day it was hard to be able to power directly what we thought the trial would be because there wasn't just enough information. But that being said, in a way we learned a lot about this. And I think as you go and look at the data in the deck there, you'll see why we think that why the drug was effective in these patients. So when you compare the number of cases that were – that saw benefit versus the placebo why we think that is just the change in variability of the asset I think that will prevent it from being statistically significant. I mean that's how we look at it. Marcio would...

Yes. Just little detail to complement that – thanks Stuart, the patients were not randomized based on this criteria, right? So we had something that like bioavailable coming from the randomization itself. That was not that well balanced. So your question about placebo. The placebo behaved similarly to what we're expecting. There was one patient as you saw there that had a response that was somewhat unexpected. But in general that was not an issue. It's more the size of the trial and the fact that they were domiciliary balanced at baseline since this was not the original endpoint. As Stuart said, we are looking for safety and some biomarkers originally. So we learned a lot. We feel that for this size of the trial when the point estimate is moving on the right direction, it does not negates the effect we're expecting to see and very important lessons of warrants in the market in several countries for DMD, the safety profile is exactly what we're expecting there.

And then the two products FA gene therapy versus the small molecule. So we're going to have two independent trials that will be going up. So I don't think you initially have to actually do them both together. So I don't think that would be an issue. We're going to be having two products that then might – with very different – one is the underlying cause of the disease that has the protein itself which is lost in the disease. And the second one really affects most likely inflammation. And so the combination of those two, we think – obviously, when you have the inflammation you have a problem in the sense reducing it as often you could especially with chronic inflammation. The second one in terms of bringing the protein that has not made it with the import. So they can do work together but we don't think right now that we'll have to do a combination study.

Great. Thank you and congrats on the progress.

Thank you. Our next question comes from the line of Martin Auster from Credit Suisse. Your question, please.

Thanks for taking the call. I had a couple of questions for you as well. From the aniridia pivotal data, I'm curious if you see any read-through to the ongoing dystrophin study. I don't know if – as you look through maybe more of the secondary endpoints you had any chance to analyze some of those? There's anything in there that kind of elevates your conviction in the drug's MOA and kind of supports an expectation period for demonstration of dystrophin expression in that study. I know you've set some fairly granted expectations around that one. And then the second, you guys have generally sounded I would say incrementally more excited about the Bio-e platform since that deal was signed and closed. And I'm curious then at the R&D day, is there going to be any new data presented then? Or will we be seeing just the tail presentations of preclinical and clinical results you've outlined to us already? Thanks.

Sure. Yes. So yes. Aniridia and dystrophin I don't think are -- we need to take one from the other. One just trying to understand the clinical manifestations that would occur with treating which we learned in terms of -- which we learned as a consequence of that and the variability of the given endpoints. In dystrophin, we feel pretty comfortable that we've done all we can do in terms of assuring that as best we can that this will be a positive study. We think that the assay that we have is incredibly sensitive and linear. And so we think we're in pretty good shape in terms of gaining that and we're hopeful that we're going to see. In a sense we have data already from the 004 study and this is -- we think there's more sense of assay that can replicate that. That being said, we've look at this as being able to have a positive result then be able to go to the FDA for approval in the United States. In terms of the Bio-e platform, yes, we're excited about that. We think it's an important platform in a novel set of compound that work in a different way than other companies have worked on before. So we're pretty excited about that. And I think you'll see on Analyst Day we'll talk more about the not only the mechanism, but more in detail of some of the things we study. We alluded to into the talk here today in terms of the work with Sumitomo in terms of ALS and we'll talk more about that and so you -- more in terms of preclinical and clinical data in that as well. So I think there'll be a lot that you'll learn as a consequence of the Bio-e platform on the June 16 day.

Great. Thanks.

Thank you. Our next question comes from the line of Vincent Chen from Bernstein. Your question please.

Hey, thank you very much for taking the question. Congrats on the progress. I was wondering if you could just -- following up on Translarna in DMD, I was wondering if you could describe the powering assumptions around the Translarna U.S. study. And what gives you confidence that the trial is adequately powered? For example, what are your assumptions around the variability and dystrophin levels in the absence of drug and in the expected effect size?

Sure. Yes, Marcio, why don't you...

Yes. Hey, Vincent, its Marcio here. So the power the -- we believe that in all the scenarios there we look in terms of being likely, since we've been looking to just one scenario here with an absolute change. We're powered at more than 90% for -- to show a difference that is statistically significant on that trial. The way we control the variability or exactly the point that has to be controlled through a series of studies leading to -- and validation work leading to this where multiple cohorts were analyzed and different biopsies as well. And we were able to really control that, so we're not concerned that would be an issue. There are obviously scenarios where a few patients show a large increase and the justifications shows a very small increase versus another one that I would say more likely that you see an increase throughout, but of a smaller magnitude. In either of them, we can see that trial being well powered to show benefit and statistical significance versus the baseline since this is the major. Based on our validation work as well what it seems that the vast majority of the patients are going to be below the lower level of complication. So if that is to be replicated, we're going to have problems in terms of like the noise that we're seeing from some of the other measures one of the reasons why we went with this method and -- both from the acquisition of biopsy and complication of dystrophin as we did.

Great. Thank you.

Our next question comes from the line of Robyn Karnauskas from SunTrust Robinson Humphrey. Your question please.

Hi. Thanks for taking my question and congrats on a progress. Just a couple. So number one a big picture. You've guided as you have before to $1.5 billion over the next few years. What are your thoughts on making sure that that can help you achieve some profitability? Just I know you can't give guidance, but what's your thought on your goals there? And how you're going to think about business development now versus you have in the past? Second question is on AADC. For the patient population that you have identified, can you give us a little more clarity as far as more recent splits in the United States and ex-U.S.? And then third on the aniridia data, if you were to exclude that high patient -- high responder patients, is there any difference between placebo and the treatment arm? Thanks.

Hey, Robyn, this is Emily. Nice to talk to you. And answer to your question about reaching that $1.5 billion revenue target by 2023. What you've seen in the past couple of years is we've really invested in driving innovation to continue to grow our revenue and we'll plan to do that as we have new launches coming onboard this year with Tegsedi and WAYLIVRA then AADC and the risdiplam royalty. We assess and invest in our redox platform or gene therapy platform and our splicing platform. Obviously, as we get towards that $1.5 billion target, there's likely a threshold of profitability, but I wouldn't say that's our priority. Our priority right now is to really invest in accelerating those pipelines to continue to drive innovation. And we've done that in the past, both through internal innovation and as you mentioned, through business development and while we have a lot on our plate on the internal side, we always cast a wide net and landscape the business development opportunities and we'll be selectively opportunistic as they arrive.

And rest of the AADC deficiency, I think, the big picture is we've been finding patients in all the areas that we've been looking and we have more of that [Indiscernible]. So that we're -- so, I mean, in the sense one of the question which I had is this is a small population that you've found. In fact, that turns out clearly not to be the case. And so, I think, the split, I think -- Marcio, one of your team has been working pretty hard on that. So why don't you give what we're looking for in the various periods?

Of course. So the splits, I think, it seems pretty even, I would say, between the U.S. and the key regions outside of the U.S. Just to remind you, we are focusing on five countries. That is first wave. So Brazil the U.S. and the three largest markets in Europe, so France, Italy and Germany. We're secondarily looking to a number of other markets that you're seeing, as well, have increased in the number of patients there, but it's fairly balanced. In terms of the key results that we expect from each one of the teams, since that's how we are measuring performance and how we're putting resource against, it's the split between the U.S. and outside of the U.S. So we expect about half of the patients to continuously coming from the Americas region and then other parts from the European region between like Eric and Adrian leaderships there. In terms of the things we're doing as well, just to start a number of new programs as we learn more, the things are happening and that are working or not working very well. We've cycled through them very quickly. And this programs includes having more people in the field in the U.S., for example, and some of the points of contact that you're seeing returning more patients. So as we learn, we're able to, again, focus the resource or refocus the resource towards growth.

And then aniridia outcome in terms of looking at the sensitivity analysis of removing -- we already have a pretty small patient population, but, I don't know, maybe you want to comment on that.

Yes. So it's more patient population to adjust that. Look, it's -- obviously, if we remove one patient with the large results, placebo effect would be seen a larger separation here and reaching nominal statistical significance. But I don't think it would be appropriate for us to speculate, because we don't know if that patient is an outlier or not. What you're seeing is in the distribution and one of the reasons we put the waterfall in the slide, we see the distribution clearly skews toward increase with ataluren. So it gave us confidence, not only for this study, but also to some extent to deal with the overall platform of ataluren.

Yes. And again, when we look at that study, when you look at the waterfall part, which I think is probably in the small patient population is a nice way to see, it's pretty apparent, the effect of the drug on these patients over placebo. And so, we look at this as a -- so we're going to be talking to physicians in the coming weeks and the key opinion leader and so, I think, we've learned a lot of this and I think helps as Marcio said, really giving people confidence in terms of the effectiveness of the drug.

Great. Thank you.

Thank you.

Thank you. Our next question comes from the line of Raju Prasad from William Blair. Your question, please.

Hi, there. It's Sami on for Raju. I was wondering if -- what format you might be presenting the dystrophin results? What kind of format you'll be presenting them in, whether it will be a medical conference or a press release? And if you have had any discussions or if you plan on having any discussions with the FDA ahead of that resubmission.

Okay. Yes, we haven't yet defined whether we'll do it at a meeting or a press release. But our goal is that, when we know this to get this out as rapidly as possible, so there's a good chance of, yes, we'll put something out as a press release so people know. And then, we could be able to present either that or a call even if we -- well, we'll figure that out. And then, the second part was -- Marcio, wouldn't you --

Yes. Sure. So, in terms of interactions with the FDA, so we're having interaction throughout this planning phase and the execution of this study. We intend to have a pre-NDA meeting as well. If we come to that, at least, that is positive. It's been discussed already and with the agency it should be in the books pretty soon. And there's many other matters as you can imagine, other than the study itself, right? There's the update of the safety database. There are the updates of the other studies, the completion of the DDI studies that were done between the two submissions. So a number of things there moving out into the agency and having productive discussions with them.

Great. And then I was wondering if you could just discuss some of the potential outcomes or next steps for the aniridia program depending on your conversations with experts, are you guys kind of thinking the program might get tabled or running another study and having it power differently? Just what your thoughts are.

So I think you know, look that's good question. And I think that's why we're going to go and talk to the key opinion leaders and talk among ourselves after that. And then we'll – if we come with the plan I think we'll talk about next steps then.

Okay.

Thank you. Our next question comes from the line of Gena Wang from Barclays. Your question, please.

Thank you for taking my questions. My first question is also regarding the biomarker data for Translarna. Just wondering, could you remind us which muscle would the biopsy be taken? And then would that be taken from the same side of the patients and how many biopsy is taken from each patient each time?

Sure. Hey, Gena, Marcio here. So we're taking two samples for every patient, two biopsies, three course per biopsy. So we'd have a total of six as a base. There's an alternate muscle as well that we haven't described before in case that is always fat coming from the six. So we have enough sample coming there. And as I mentioned on the answer to Vincent's earlier we have run some of the tests in terms of the validation. We know based on the very kind submission of time and sit-ins that we have from different patients that it shouldn't be a problem. We're doing the biseptics and gastroids for – beside the primary side and the TA [ph] as a secondary side or first area side may I say here. So the primary is really to read the six course that it would have. One of the nice things during the validation as well is that when we compare the course we've seen very, very small variability. So we can use any of them to measure. Does that answer?

Yes, yes. So - but will you have individual data or you will pool these baseline together?

Yes. So that's a very good question. So we will show – so the way the analysis is a difference for the individual patients from their baseline, right? Obviously, we're going to compute that nefarious task later statistically. But each one of those stations are going to be looking versus their baseline because while we expect that the baselines are going to be very, very small, even below the level of complication, we cannot guarantee that that's the case. So a simple tools analysis has been changed because it skewed the results. So each one of them are going be looking individually and then going to compute the difference – any difference for all the patients.

So Marcio I was wondering, say each individual patient they have six samples. Will these six examples pool together or will be individual like a six baseline?

No. So just one – so it's the best sample for baseline in four weeks 40 for each one of the patients that's going to be used for the analysis.

Okay. Great. And then I have a question regarding the mitochondrial epilepsy trial. Just wondering, was the primary endpoint, was that based on the FDA discussion feedback? And also how do you measure the seizure? And then do you capture both generalized seizure or partial seizure? And how do you report the seizure events, especially for those having seizure if you wanted to cover them?

Sure. No absolutely. I would say the trial design is to some extent very similar to other drugs that were just approved with genetic epilepsy in general like I'm sure you know the ones I mentioned. We are developing like a diary – specific diary for this trial. That's going to account for this patient population. So looking to generalize seizures at this point in time for these patients and looking for the change. There were obviously discussion with the different regulatory agencies here. The key design of the trial of agreed under our Scientific Advisory working party protocol with EMA and we're using this time for the FDA of course.

Okay. Sorry just one more question. Regarding generalized seizure, so in a case that patient I'm just wondering will caregiver also have a follow – if a patient have a generalized seizure and then the patient actually wasn't aware he had a seizure because he was passed out? And how would you recall the events like that?

Well, that's going to be recorded by the caregiver after they should have made that clear, right? So most of the patients we're talking about are infants or toddlers or young kid, so we're talking about the caregiver-recorded diary here.

Okay. Okay, thank you.

Thank you.

Thank you. Our next question comes from the line of Brian Abrahams from RBC Capital Markets. Your question, please.

Hey guys, thanks very much for taking my questions. Can you give us a sense of the agency's comfort around the ECL assay just in terms of validation and quantitative ability for dystrophin measurement relative to other techniques versus Western? Secondly, can you characterize in general how the regulatory interactions have been going for risdiplam initially and your level of confidence in a timely approval with broad label? And then lastly to maybe just an earlier question a different way on risdiplam. Now that you guys have had an opportunity to further explore the FIREFISH and SUNFISH data and looking at potentially comparative subgroups and endpoints. What's your level of confidence that the magnitude of benefit is comparable to SPINRAZA in types 1, 2 and 3 patients? And are there any subtypes where you think efficacy may be better? Thanks.

Yes. Sure. So, maybe we'll start with the dystrophin measurement. That was one obviously when we've had substantial discussions with the FDA on this. And it wasn't one where we -- in the essence we actually -- I remember I was discussing first saying how I'm sure you would want a Western blot. They said no not really. And I assumed they don't like Western blot. They understand the limitations for those if you have a better assay, would be interested. And so we had been working on and we have been using in our own laboratories this unique form of an ELISA in ECL. And so -- and they like that. So, they -- we worked with them and Marcio and the team had worked for quite some time. And so maybe why don't you talk a little bit about sort of the -- it was sort of a six to eight-month interaction and they were pretty much pleased I think very much with the work and the sensitivity. I mean I think we're very excited about this assay.

That's right. So, we worked very closely with the FDA and specific officers there on the validation of the assay and they are completely on the stage as we are in terms of the measure itself, right? Obviously, the results we're going to see after the trial. If reads the results soon, but the assay itself and the sensitivity on the way was validated was obviously a concern I would say in general from us and from the FDA from the beginning because this is full and they're certainly very different than what others were doing. We had to have an external standard. Once you are doing the ECL, the external standard has to be hyperpure and so on. So, we did all this work with them and to the satisfaction of the agency and obviously ourselves as well. We decided to use a third-party lab to do this -- to eliminate any potential bias that an internal lab could add to such matter not unblinded study. So that was how we done that. Again, I think we're all pleased. It took a very long time to validate and to discuss with the agents, but we're on the same page now.

Yes. And in terms of the risdiplam in terms of the broad label I think we're -- in terms of the having FIREFISH and SUNFISH and the part -- that was part 1. But part 2, I think both of them actually help really understand further the drug itself and how effective it can be. I think in terms of the SUNFISH trial. Really it's hard to compare to concern that no one else has done a two to 25-year-old trial. We're in such a broad label, broad inclusion criteria that we have facing with scoliosis with Hammersmith baseline scores less than 10. And I should point out that those -- in the real-life cases even in the two to five-year old, 20% of the patients had Hammersmith scores of less than 10 and there was also scoliosis and often fractures. And so you're really going to have a hard time. So, we're pretty excited of the fact that with a statistically significant improvement in this broad population. And we think that gives us a leg up and that no one else has this data when we talk not only for physicians but to the payers that you've actually studied the types of patients that you're going to be intruding. And in fact no one else has that. I think in terms of -- when you think about FIREFISH and a FIREFISH, I think is anything but comparable. I think that becomes clear. And I think in terms of looking at age is probably the most determinative figure and you could see -- and I think you can look at the risdiplam data and if you have patients of greater than five months of age you still saw increases in sharp in 10. And that wasn't seen in other cohorts as well. So, at the end of the day, I think when you're going to compare -- if you wanted to do a comparison, those are the closest and you could look at the other trials and they have basically far younger patients then what we saw and yet we saw a very strong data, not only in the early patients, but also though in the Type 1 takes that were even older. And so we're pretty happy about that. We look forward to actually talking far more about that at the AAN. So, I feel pretty strongly that risdiplam is a highly efficacious drug that will be used quite broadly in the population.

Thanks so much Stu. Thanks Marcio. And congrats on all the progress guys.

Thank you.

Thank you.

Thank you. Our next question comes from the line of Joel Beatty from Citi. Your question, please.

Hi, guys. This is Shawn Egan calling in for Joel. A few questions from me today. First few on the LatAm franchise with on potro getting ANVISA approval. Can you talk about what advantages having an established LatAm infrastructure to give you guys for marketing TEGSEDI? And then, onto WAYLIVRA following a positive Phase 3 broaden study in FPL; will any of the data be included when you guys submit in the second half? And then I'll have one follow-up on the redox agent.

Sure. So thanks for the question. Talking a little bit about LatAm, right? So, the approval of TEGSEDI last year giving us a lot of advantage here in terms of the overall timing, first, a lot of things were done in between. So one of them -- obviously, you have to characterize and agree with the government just to cite you. That takes some time and we are well underway here. The second is the genotype infrastructure. As mentioned on my prepared remarks, about hundreds of patients now we cannot typically confirm hATTR, not only in Brazil but in Argentina and Colombia and other places. So, we are way ahead of the game there. And then the last one that is not less important, I would say, together with the infrastructure that we have in the country, that is very robust since we have substantial sales of Translarna from the region, is the fact that the health system I can -- look at the situation we are right now. Discussing how system capacity in the words in general, don’t think you want to overload hospitals with IV deliveries in general. So the ability to deliver this on people's home, the ability to monitor them as we have the nursing network, have been quite fundamental and we've seen really positive feedback. So the launch is now underway and we're expecting to see -- we should expect to see more and more updates on this in relation to that. And your second question in relation to WAYLIVRA, right? So, the first approval we expect for FPL and shortly thereafter to complement that data set with FPL. So, we wouldn't be -- at least our base case right now is not to have the two indications upfront.

Got it. Thank you, Marcio. And then, on the 743 redox agent in epilepsy, for that pivotal study, can you maybe talk about how you plan to enroll? Will it be an all-comer study for patients with metabolic mutations? Or will you be enrolling any kind of particular mutations more or less? And then kind of going one step further, what could -- if the study is successful, what kind of the indication look like? And is there a potential for -- if there's like a clear benefit in some genetic subpopulations for like a smaller approval?

Yes. No, this is a great question. So, it's kind of both, right, in this study. As we went through the scientific advice what we've heard very loud and clear specifically from the EMA that they wanted both a very general population in terms of genetically fine mitochondrial epilepsy with seizures that are not controlled, so we could potentially treat any patient, any comers after the approvals come, an approvals to come. We also do have the most common mutations being represented. So I'm going to be discussing that a little bit more in detail, but there are four major groups of mutations that we're going to have a balance for those patients. One of them, one of the most common is Leigh syndrome, might be familiar and may last as well amongst others. So on the June 16, we’re going to be well underway on planning that and hopefully executing as well, going to be discussing exactly what is the expectation of the trial and the market potential and so on. As I mentioned on the prepared remarks as well, we do expect about 5,000 to 6,000 patients in the geographical population here. So it's very large. And this patient because of the type of strap they have, they do not respond well to any of the common therapies that are available right now. So this will be really life-changing for them. And we really expect more power in the drivers of that.

Great. Thanks, Marcio. I appreciate it.

Thank you.

Thank you. Our next question comes from the line of Vincent Chen from Bernstein. Your question please.

Great. Thanks for taking a few follow-up questions. Just a few on the DMD trial for Translarna. First one is simply, did I hear correctly that you'll be comparing the best sample of baseline and the best sample at the end? How is the best sample to determine and why not use the average? Second is, I was wondering you alluded to very low variability in the validation test. I was wondering if you could quantify the degree of variability you've seen and how are those run? And then - maybe a third actually, given the FDA has shown comfort with using Western blot historically, even it has its imperfections, what was the rationale for going through the work to sort of move to ECL rather than using Western blot given that regulators seem to be willing to use Western blot?

Yeah. So I’ll start with the last. First, was that well, maybe been, I don’t think they’re actually all that comfortable with the Western blot. I think it's the best that they probably had, but they don't think that it's a great assay for a large protein that that doesn’t blot very well. And that -- and so we thought also gives you that's -- I think that in the situation, it could give you depending on how it works with greater variability more chance for potential missing things that are positive. So at the end of the day, we think about a more reliable assay gives a better chance versus that. In the month of -- Marcio will go through that.

So, the decision about using the fast case, right? So, one, it obviously result-simulated, in the way, the most reliable. So, one, you can have a situation or one of the cohorts or one of the samples is contributing to data biceps. So that's one of the reasons not to average, because it wouldn't be a true average, rather than just getting lucky to some extent and I think when you look into other studies, our study for an example all these studies you have gained by marine wanting to expand some of the others drugs that are in the market, you do see samples that cannot be used or have to be heavily compensated because of that. So, that's one of the reasons you use. The other as you asked in terms of the validation cell, the expectation we didn't know where the sample was coming from upfront, right? We're asking the question can I biopsy a patient multiple times and see the results that are very similar, and the answer is yes with this method. One more reason not to use other methods like if you're looking to both types of biopsy that were used before number one in classification assays that were used before, you see intra sample were available like 30% or 40% sometimes and that's obviously not acceptable. And as Stuart said, when you blot a protein that is big we're going to have intrinsic variability unless you're looking for super-truncated part of the protein and that's not a case like where we're looking into full length here.

Okay. Thank you very much.

Thank you.

Thank you. This does conclude the question-and-answer session of today's program. I'd like to hand the program back to Stuart Peltz, CEO.

Thank you. Thanks for joining us today on the call. And I don't know -- as you may be aware, the Rare Disease Day that was this past Saturday and I think it's a good time for us to take stock of where we are as a company and the importance of the work that we do that ultimately will benefit patients. And so with that in mind, we're quite proud to be a global commercial diversified biopharmaceutical company that's focusing on these therapies to help treat rare genetic disorders. So, with that let me thank you again and we look forward to seeing you at our Analyst Day later this year. Thank you.

Thank you, ladies and gentlemen for your participation in today's conference. This does conclude the program. You may now disconnect. Good day.