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Corbus Pharmaceuticals Holdings, Inc. (CRBP) Q2 2020 Earnings Call Transcript

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CRBP earnings call for the period ending June 30, 2020.

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Corbus Pharmaceuticals Holdings, Inc. (CRBP)
Q2 2020 Earnings Call
Aug 6, 2020, 8:30 a.m. ET


  • Prepared Remarks
  • Questions and Answers
  • Call Participants

Prepared Remarks:


Hello, and welcome to the Corbus Pharmaceuticals Second Quarter August 6th, 2020 Earnings Conference Call. [Operator Instructions] This conference is being recorded at the Company's request and will be available on the Company's website following the end of the call.

I will now turn the conference over to your host, Ted Jenkins, Senior Director, Investor Relations and Corporate Communications. Please go ahead, sir.

Ted Jenkins -- Senior Director, Investor Relations and Corporate Communications

Thank you, Brock. Good morning, everyone. At this time, I'd like to remind our listeners that remarks made during this call may state management's intentions, hopes, beliefs, expectations or projections for the future. These are forward-looking statements that involve risks and uncertainties. Forward-looking statements on this call are made pursuant to the Safe Harbor provisions of the federal securities laws.

These forward-looking statements are based on Corbus' current expectations and actual results could differ materially. As a result, you should not place undue reliance on any forward-looking statements. Some of the factors that could cause actual results to differ materially from those contemplated by such forward-looking statements are discussed in the periodic reports Corbus files with the Securities and Exchange Commission.

These documents are available in the Investors section of the Company's website, and on the Securities and Exchange Commission's website. We encourage you to review these documents carefully. Joining me on the call today are Dr. Yuval Cohen, our Chief Executive Officer; Dr. Barbara White, our Chief Medical Officer and Head of Research; Sean Moran, our Chief Financial Officer, and Craig Millian, our Chief Commercial Officer.

With that, it is my pleasure to turn the call over to Yuval.

Yuval Cohen -- Chief Executive Officer, Director

Thank you, Ted. Good morning, everyone. It is my pleasure to welcome everyone to Corbus Pharmaceuticals second quarter of 2020 earnings conference call. Our team has had a very busy second quarter. We are on track for what we believe could be a transformative year with multiple anticipated catalysts in the coming months.

First, we look forward to top line data from our recently concluded Phase III systemic sclerosis study this summer. Next, these results will be followed by our recently concluded cystic fibrosis Phase IIb study results in the third quarter. With these critical data readouts now closer than ever, we are focusing more and more on preparing the groundwork for NDA submission and then commercialization following potential FDA approval.

At this time, our finances are stronger than ever, having just announced that we've raised additional capital of up to $121 million from a combination of our ATM strategy and a debt financing deal from K2 HealthVentures. This significant capital investment, ahead of data, gives us the ability to have strategic flexibility following data without the pressure of a financing overhang.

We are also very pleased to have Dr. George Golumbeski join us as a new Board member on our Board of Directors. George's experience growing companies and advancing innovation will be a significant asset to Corbus as we transition from an R&D-only organization to a commercial stage company with a deep pipeline of novel drug candidates targeting the endocannabinoid system.

I will now turn the call over to our Chief Medical Officer and Head of Research Dr. Barbara White, to provide us with an update on our clinical and research programs, to be followed by comments from Craig Million, our Chief Commercial Officer. Thank you, Barbara.

Barbara White -- Chief Medical Officer and Head of Research

Thank you Yuval. I would like to start by reviewing the impact of COVID-19 on our clinical programs. COVID-19 did not substantially delay last patient last visit in the RESOLVE-1 study or the Phase IIb CF study. However it has slowed time to database lock. For the RESOLVE-1 Phase II and the CF-002 Phase IIb studies, anticipating and responding to the potential negative consequences of COVID-19 on study integrity took priority over other activities that are usually done near the end of a study.

In person access to study staff and data at study sites was essentially shut down for about three months and remains limited. Similarly, physical access of study site staff to their own sites was restricted and some sites even closed temporarily. These restrictions limited the ability of study site staff to do in-person assessments of subjects and slowed data entry and responses to questions about data.

To adjust for these changes and access to sites and data, we set up and continue to use alternative ways to monitor study data, that is remote data monitoring and central data monitoring. Combined, these COVID-19 associated limitations have slowed completion of data entry and data cleaning, and hence, database lock for the systemic sclerosis Phase III and CF Phase IIb studies. Nonetheless, we are expecting top line data from the Phase III SSc study soon to be followed by the CF-002 top line data.

In addition, although COVID-19 associated limitations at some vendor slowed the start of some supportive Phase I study, those studies are now ongoing. Last subject visit in the RESOLVE-1 Phase III study was reported on May 27th. We dosed 365 subjects in the double-blind placebo controlled part of this study. Of subjects dosed, 328 or 90% completed the study and 37 or 10% discontinued the study early, which is lower than the discontinuation rate we assumed at the start of the study.

We estimate that the SSc 002 study remains greater than 90% powered at P less than or equal to 0.05 for the primary efficacy endpoint, ACR CRISS score at week 52. Data entry for the RESOLVE-1 study is complete and data cleaning is expected to be completed in the very near term. We are on schedule to report top line data this summer, following database lock and data analyses.

The open label extension of the RESOLVE-1 Phase III study, which is separate from the open label extension of the Phase II SSc study is ongoing. 98% of eligible subjects or 320 of 328 subjects entered the open label extension and 33 subjects have already completed at least the first year in the OLE. Only six subjects or 2% have dropped out of the SSc 002 open label extension to date, which we find encouraging, given the extra burden of coming for study visits during COVID-19.

Of note, at the 3.5-year mark in the Phase II SSc 001 open-label extension, 25 of 36 or 69% of the subjects were still in the study. This quarter, new analysis showing ACR CRISS score correlates with improvements from baseline on how patients feel and function from the Lenabasum SSc Phase II study were presented at the 6th Systemic Sclerosis World E-Congress.

In addition, data showing the biologic effects of Lenabasum may include inhibition of inflammasome activation were presented at the EULAR annual conference. We are also pleased to announce that Kaken Pharmaceutical, our partner in Japan, recently obtained orphan drug designation for Lenabasum for the treatment of systemic sclerosis from Japan's Pharmaceuticals and Medical Devices Agency or PMDA.

Turning to the CF-002 Phase IIb study, last subject visit was reported on June 22nd. We had 425 subjects dosed in this study. Of those 387 or 91% completed the study and 36 or 9% discontinued the study early, which again is a lower discontinuation rates than we had assumed at the start of this study. Power for the CF-002 study remains unchanged at about 80% for event rate of pulmonary exacerbations at 28 weeks with P less than or equal to 0.05. Data entry for the CF-002 study is nearly complete and we are actively cleaning data.

Yesterday, we reported that last patient first visit in our DETERMINE Phase III study of Lenabasum in dermatomyositis occurred. This study dosed a 176 subjects, which exceeds the enrollment target of 150 subjects. To-date, only 4 or 2% of subjects have discontinued from the study early. The open label extension of this study is active and all eligible subjects have enrolled to date. Of note, at the three-year mark in the Phase II DM-001 open label extension, 16 of 20 or 80% of subjects were still in the study.

The NIH sponsored 100-patient Phase II study of Lenabasum in Systemic Lupus Erythematosus is ongoing. Study enrollment was temporarily halted by the NIH because of COVID-19, but has recently resumed at several sites. 87 subjects have been enrolled to-date, and we are optimistic that enrollment may be complete by the end of the year.

I'm going to speak briefly about several preclinical programs now. CRB-4001 is a CB1 inverse agonist which improves metabolic abnormalities and reduces inflammation and fibrosis in non-clinical models of disease. CRB-4001 is undergoing chronic pharmacokinetic studies in primates to measure brain exposure. Results of these studies are expected this year.

Our pipeline is growing. As you may remember from our last R&D Day, CRB-317 is one of our promising CB2 agonist that Corbus has developed in-house. We are pleased to announce that CRB-317 has been selected as our next candidate for development, based on its significant potency and selectivity for CB2 and biologic activity in animal models of inflammation and fibrosis. Non-clinical studies and formulation work to enable IND submission are under way. We expect CRB-317 to be in Phase 1 safety testing in 2021. We will share information with you at our next R&D Day.

I will now turn the call over to Craig Millian who will provide the commercial program update.

Craig Millian -- Chief Commercial Officer

Thanks, Barbara. Good morning. We're very excited to be moving closer toward top line data and the anticipated commercialization of Lenabasum. Over the second quarter, we continued to effectively execute on our key prelaunch activities. And today I'm going to provide brief updates on the progress we're making to build out our launch team as well as on our disease education efforts.

With leadership in place in the key areas of marketing, market access, commercial operations, and medical affairs, we are advancing plans for scaling up our teams to support a successful launch. The first area of focus is implementing our field medical go-to-market model.

We are executing a phased approach that will ensure a robust and appropriate field medical presence ahead of launch. With the initial hiring of a small number of Medical Science Liaisons or MSLs which would follow positive clinical data. The MSLs are part of the medical affairs team reporting up to Barbara. They will be experts in scientific and medical information related to the disease states we're studying, as well as our clinical programs. MSLs will be responsible for building strong relationships with external clinical and scientific leaders at both the national and regional level.

We also plan to begin scaling up other key launch-related areas including, national payer accounts, patient services and reimbursement, commercial technology, marketing, and market analytics. I look forward to providing additional details in future calls as we further build these capabilities following data.

Turning briefly to disease education. On our previous call, I highlighted the progress we're making on the rollout of the total SSc campaign. Earlier this year, we launched this disease education campaign targeted to rheumatologists and we are continuing to build out and fully leverage this program. The website has seen traffic steadily increase month over month, and to-date the website has received more than 19,000 unique visitors.

More recently, we expanded our disease education outreach with an email campaign directed to the majority of physicians who treat systemic sclerosis as identified via claims data. We are actively collaborating with systemic sclerosis key opinion leaders to further expand educational subject matter including videos and other dynamic content and we plan to have this available on the TotalSSc website later in the year.

As Barbara mentioned, Corbus had a strong presence at the Virtual Systemic Sclerosis World E-Congress. We fully leveraged the Total SSc campaign at the Corbus virtual booth to drive engagement and to educate on the total burden of systemic sclerosis, the unmet need, and the promise of CB2 agonism. We were pleased to learn from conference organizers that there were 1,300 meeting registrants and a large portion visited our booth and engaged with key content.

In summary, we continue to make substantial progress ensuring we will be in a position to successfully commercialize Lenabasum following FDA approval and to provide an important treatment option to patients suffering with this debilitating disease. I look forward to continuing to update you on our expanding efforts in the coming months and will now turn the call back over to Yuval.

Yuval Cohen -- Chief Executive Officer, Director

Thank you, Craig -- thank you Barbara and Craig. I will now provide an update on our financial position. We head toward our data announcements with a strong balance sheet. We recently announced up to $121 million in new capital comprised of approximately $71 million from our existing ATM and $50 million debt financing facility with K2 HealthVentures, of which $20 million is in the first tranche.

We've also received a $5 million milestone payment from the Cystic Fibrosis Foundation to whom we are very grateful. We reported $101 million of cash on hand as of July 28, 2020, putting us in a strong financial position, and giving us valuable strategic flexibility heading into data.

In closing, I would like to reiterate how excited we are for these upcoming milestones. We are on the verge of an inflection point. We believe that the upcoming data would change our company and we are poised to make the transition from an R&D-only organization to a commercial stage company.

Thank you all for your time and attention this morning. I now turn the call back to the operator and we'll open the call for questions from our audience.

Questions and Answers:


Thank you. We will now begin -- we will now be conducting a question-and-answer session. [Operator Instructions] Our first question today comes from Brian Abrahams of RBC Capital Markets. Please proceed with your question.

Brian Abrahams -- RBC Capital Markets -- Analyst

Hi, there. Good morning. Thanks for taking my questions. Congrats on the progress and really appreciate all the detailed -- all the details on timelines and enrollment across the clinical trials. I guess my first one is on the patient reported outcome components of CRISS. I guess I'm wondering coming out of the recent presentation, any sense as to how the FDA or KOLs as well are viewing CRISS overall and regulatory amenability to -- I guess to approval on CRISS if the benefits are predicated primarily on the PROs versus trends in mRSS?

Barbara White -- Chief Medical Officer and Head of Research

Hi Brian, this is Barbara. Thanks very much for your question. I think as we've discussed before, based on what has happened in past clinical trials; KOL opinion, in my belief, has swung toward thinking that change in modified Rodnan skin score or mRSS, while a valuable assessment of skin thickening, perhaps is not performing especially well or hasn't performed especially well as the primary efficacy outcome in trials in systemic sclerosis and they have moved toward thinking about a more holistic approach at looking at the impact of treatment on the overall disease.

And with that in mind, the ACR CRISS score is the best composite outcome that we have at this time. It uses five clinical measures that are thought by experts around the world to be those most important to assess in clinical trials in systemic sclerosis. So, we do think that at this time, KOL opinion, in general, is supportive of this holistic approach at -- looking at improvement in patients on study drugs

In terms of the regulatory agency views, as I think we've said before, the FDA has been quite clear that -- to us that the choice of primary efficacy endpoint was up to us. We told you we've chosen the ACR CRISS and the reasons why, and they have also stressed that they want to look at the totality of the data. We believe that the ACR CRISS score with its five components that are considered by the experts to be most essential in evaluating the overall status of patients will speak to treatment benefit.

They include not just patient reported outcomes, but as I said, effect on skin, effect on lung and the physician global assessment. The way the score works is, all will contribute. That's certainly a reasonable expectation, all will contribute. So we expect to be able to show that the score does correlate with how the patient feels and functions, which will be important to regulators.

Brian Abrahams -- RBC Capital Markets -- Analyst

Got it. That's really helpful, Barbara. Thanks. And then, what additional work will you need to do to file the NDA in systemic sclerosis following the data? I think you mentioned some additional supportive Phase 1 work and I'm curious if you could talk a little bit more about the potential timelines between data and filing and how COVID could potentially impact that?

Barbara White -- Chief Medical Officer and Head of Research

Well, I think that we -- or as I mentioned, there are some Phase I studies that are under way and that we will complete and we do not believe will delay the filing of the NDA. They have to do a thorough TQT [Phonetic] study and studies on folks with hepatic and renal impairment and they are all under way.

Most important step or the next step to getting to NDA filing is actually to have the pre NDA meeting. And we are, at this point, anticipating that that will happen at the end of the year and we will then, based on what we hear move forward with NDA filing. So again, I think we are anticipating the NDA filing of course happening next year, but I think in terms of timelines we'd really rather prefer to wait till we have input from the FDA itself.

Brian Abrahams -- RBC Capital Markets -- Analyst

Makes sense. One last one from me if I could, you spoke a lot about managing through some of the potential COVID related headwinds when it comes to the data cleaning and analysis over the past few weeks. Now that you're through last patient, last visit as well. Can you also talk about the overall impact of the pandemic on data collection expectations for missing data relative to, I guess, what you had anticipated going in and how you guys are managing through that from a statistical analysis and imputation standpoint? Thanks so much.

Barbara White -- Chief Medical Officer and Head of Research

Sure. Thanks, Brian, for that one too. First of all, we were able to assess safety on essentially all the patients because that can be done remotely and that held true for all the studies across the board that we're doing. And that's really the most critical thing. When it came -- in the SSc Phase III study, we were nearly at the end and most of the patients were out. There were some patients in the last two visits who did not have efficacy assessments.

We -- the FDA has issued some guidance on how to handle these and what we've done and are doing in our statistical analysis plan is consistent with that. And because we enrolled more patients than we had anticipated, we had less drop out than we thought we would have, and we were very well powered to start with. As I say, we still remain more than 90% powered for ACR CRISS at week 52.

So yes, we lost a few assessments at the end, but it's not enough to make a substantial difference in our powering. And the other thing is that the way statistical analysis are done, variability is assessed across the study using a mixed model repeated measure. So that also helps with our Powering.

In terms of the CF study, again safety was done on all the patients. In this case, the primary efficacy endpoint was actually done on all patients despite COVID-19 because that was set up, so it could be done remotely from the very beginning. It's an assessment of the occurrence of pulmonary exacerbation. So we didn't lose any efficacy data at all in the -- for the primary endpoint in the CF study. So again, that remains well powered.

Dermatomyositis study was largely in the early phases and we again don't expect a substantial impact on the data or the powering there. The bigger impact was some delay in the start of the Phase I studies, which have all started at this point.

Brian Abrahams -- RBC Capital Markets -- Analyst

Got it. That's super helpful. Thanks again, and looking forward to the data.

Barbara White -- Chief Medical Officer and Head of Research

Thanks, we are too.


The next question is from Maury Raycroft of Jefferies. Please proceed with your question.

Maury Raycroft -- Jefferies -- Analyst

Hi, good morning, everyone. Congrats on the progress and thanks for taking my questions. So, I had one on SSc, so you guys have previously mentioned that FDA has indicated that you don't need to hit stat sig on mRSS. I'm wondering if there is any specific guidance regarding percent FVC in lung function and what your thoughts are on the commercial or real world setting for patients with worsening FVC? I guess are there natural combo strategies in mind that you guys have?

Barbara White -- Chief Medical Officer and Head of Research

Mark, this is Barbara. I think I didn't quite hear the very last part of the question. So, would you mind repeating that before we go ahead? I want to make sure I do.

Maury Raycroft -- Jefferies -- Analyst

Sure. Just wondering if you guys have thoughts on commercial or the real world setting for treating patients with worsening FVC and are there natural combo strategies in mind for that?

Barbara White -- Chief Medical Officer and Head of Research

Okay. So, I'll take the first part and Craig will take the second. So in terms of FVC, that's our third secondary endpoint. What we anticipate seeing is less decline from baseline in the Lenabasum treated patients than in the placebo-treated patients. The natural history is that over the course of a year, we would expect in the placebo group, you know several percentage points, 2.5% to 4% reduction in FVC percent predicted and we anticipate seeing less than that in the Lenabasum treated patients.

This study is not powered to see a statistical difference in the FVC. That requires a much larger study and probably particular selection of patients who may be at greater risk for decline in FVC over time. Nonetheless, I want to point out that the baseline FVC percent predicted in our Phase III study is just about 80%, which is right at the borderline, if you have less than 80% predicted as an individual that can be considered to have -- you could be considered have restrictive lung disease.

So the patients in our study do indeed have substantial lung involvement and we do expect to see an impact and we expect that that will address a very significant unmet need. Craig?

Craig Millian -- Chief Commercial Officer

Yeah, just a few comments. So, about 40% to 50% of patients with the diffuse form of systemic sclerosis have some clinically meaningful interstitial lung disease. And so we know that -- that's a priority of treating physicians to treat that component of systemic sclerosis. We would expect, based on -- as Barbara describe the patients that are in our trial, many of whom are already on stable immunosuppression in part to treat their lung decline that we would be used in a complementary fashion for all the other elements of systemic sclerosis that are problematic.

So, again, we view in terms of, we think about patient segmentation, we view this certainly as potentially a population of patients who will be on polypharmacy, and certainly we view, we'll see what the data tell us, but Lenabasum, if the data are favorable, should be a helpful addition to the armamentarium for these patients for all the other troubling components of diffuse systemic sclerosis.

Maury Raycroft -- Jefferies -- Analyst

Got it. That's very helpful. And then as a follow-up question, just given the skin involvement in SSc. I'm wondering if you can comment on overlap of sites and investigators between SSc and the dermatomyositis studies. And does the over enrollment in the randomized study say anything about investigator enthusiasm and whether this was impacted by what the investigators are seeing in SSc.

Barbara White -- Chief Medical Officer and Head of Research

This is Barbara. Thank you, Mark, again for the question. There is overlap. The diseases themselves have some substantial clinical overlap and disease manifestations and certainly, both are characterized by chronic inflammation and some degree of tissue damage. We're at academic sites. We're at top sites around the world and we're looking at rare diseases in rheumatology. So that certainly lends toward overlap.

In addition, we've had experience with these sites and investigators in SSc so that allows us to feel more comfortable and then to feel more comfortable with the DM study. So we think there is actually real operational pluses by using some of the same sites. I think that in terms of the over enrollment in the DM study, it really has been -- it really has been, to us, quite rewarding. We didn't know what the enrollment was going to be like. Others have had trouble enrolling much smaller studies.

Our KOLs told us, you know our advisors told us upfront, "Hey, you're going to have a tough time getting to 150." But we knew that we wanted to get at least that many for powering purposes. But when the study started, it enrolled -- it started enrolling much more quickly than we thought. It kept on going even during COVID-19. Certainly it's slowed, I mean, we're still in COVID-19, but it slowed during the early throws of COVID-19.

And when sites began to reopen and enroll more patients, they just came in very quickly. We could have easily enrolled more. And I think that that does speak to, first and foremost, the unmet need. This is a disease in which people have significant skin and lung and muscle and joints involvement as well as that of other organs. And they also are pretty much left to immunosuppressants, immunomodulating agents.

The patients in our DM study, we've, again, presented the baseline characteristics report [Phonetic] are very sick. They've got more skin involvement than we thought. They've got significant weakness. Their patient-physician global assessments are all in the mid-range and at mean, and most of them are in background immunosuppressive.

So these are a group of patients with very substantial unmet need and I think that speaks in part to the enthusiasm, over enrollment. Of course we'd like to think that experience that the investigators have had already and experience they had with their first subjects in, had something to do with the speed and our ability to overenroll. But we're also optimistic. So I'll stop with that.

Maury Raycroft -- Jefferies -- Analyst

Great, great perspective. I guess do you know the exact number of overlap of sites between the two studies?

Barbara White -- Chief Medical Officer and Head of Research

You know I don't have that at my disposal -- my fingertips. So I wouldn't want to give you an incorrect information, but there's a fair number of them.

Maury Raycroft -- Jefferies -- Analyst

Understood. Okay, thanks, again, for taking my question.


The next question is from Leland Gershell of Oppenheimer & Company. Please proceed with your question.

Leland Gershell -- Oppenheimer & Co Inc. -- Analyst

Good morning. Thank you very much for that comprehensive update and for taking my questions. Just a regulatory question for me. You said that the Phase II in CF could serve as a registrational study pending the data. Was that coming sometime after the RESOLVE data? How should we think about the regulatory approach there? Would that be kind of a dual NDA approach? How should we think about timelines? Presumably you'd want to include CF along with RESOLVE when you go to the FDA, given the division. Will there be kind modules shared in the application. How should we think about that and the mechanics and the timeline? Thank you.

Barbara White -- Chief Medical Officer and Head of Research

Leland, this is Barbara. Thank you again for that question, very insightful. Our current thinking is that indeed we would want to submit one application rather than two, should both of those studies be positive. There is certainly room in a number of sections for the NDA application to use the same information, particularly in the non-clinical -- in the non-clinical Module IV and the CMC Module III certainly Module I, and some aspects of the safety review in Module II. So there is lots of room for overlap to help be efficient.

Leland Gershell -- Oppenheimer & Co Inc. -- Analyst

Great. So we would -- I guess my question will be, would CF at all meaningfully delay the process or would it be negligible [Speech Overlap].

Barbara White -- Chief Medical Officer and Head of Research

We think it's quite -- we think it's quite manageable. Certainly, we are expecting the CF data, as we said approximately a month after the SSc data come out the top line. There are other things that need to be done in terms of getting the NDA ready and waiting for the CF data is not going to substantially delay the overall submission.

Leland Gershell -- Oppenheimer & Co Inc. -- Analyst

Okay, great. Thank you very much for taking the questions.


The next question is from Dae Gon Ha of BTIG. Please proceed with your question.

Dae Gon Ha -- BTIG, LLC -- Analyst

Great. Thanks for taking our questions and congrats from my end as well on all the progress despite COVID-19. Hope you guys are all staying well. So just a couple from me. Maybe, Barbara, just wondering what your latest thoughts are on how much disclosure or how much data you will be presenting for both RESOLVE-1 and the CF data expected this quarter.

Specifically, I guess for RESOLVE-1, what component scores can we expect and as well as, since you talked about OLE, can we expect any of that OLE data to also materialize when you report the top line data?

And then, just following up on an earlier question, just looking at ACR CRISS once again, not to beat a dead horse here, but recognizing that mRSS plays a critical role also in ACR CRISS calculation, just wondering if you can speak to what strategies or strategies you had implemented to minimize variability and how that has kind of evolved given the COVID-19 restrictions of monitoring, if you will. And then I've got a follow-up?

Barbara White -- Chief Medical Officer and Head of Research

Okay, let me see -- thank for only doing them two at a time, I'm going to try and remember them both. I think I've lost one already. So let me start with the one about data variability with mRSS. Certainly mRSS is a major driver of the ACR CRISS score, we're talked about that. The other components augment and increase the score or decreased the score to make it more clear, whether the patient improved or did not improved from the baseline. But the mRSS is very important and we certainly expect that mRSS changes will be directionally correct if not statistically significant in this study.

And to reduce variability, we did -- first of all we selected investigators who, for the large part, in fact nearly all of them had had extensive experience in the care of systemic sclerosis patients, in the assessment of the skin thickening involving mRSS, and in the conduct of clinical studies. The next thing we did was we train them uniformly. There is a Scleroderma Clinical Trials Consortium, an international group of experts and they -- with them we developed a course and the approach to actually train all the investigators in the same way to do the score with live patients and they had to pass certificates.

Next we monitored the data. If there was a significant variability we queried it. And if we needed to, we actually retrained the investigators. So looking over blinded data, I don't -- I'm not anticipating undue variability in the mRSS scores or lot of unexpected kind of data. So I think that's where we are with that.

Now the first question, again, Dae Gon about the ACR CRISS-what's it again?

Dae Gon Ha -- BTIG, LLC -- Analyst

First question was just looking at what can we expect when you report top line data for both RESOLVE-1 and CF?

Barbara White -- Chief Medical Officer and Head of Research

Yeah, yeah. So, for both of them, of course, you will get safety information that's always critical. You will get the disposition, so you will know how many patients they bought [Phonetic], you will get the primary efficacy endpoints and you will get for the SSc study the secondary efficacy endpoints. And for the CF study, you will get perhaps a few of the secondary, so it's a longer list the secondary's and I think most -- they're not quite as relevant actually as the actual event rate of pulmonary exacerbations.

So by the time we're done with top line of the systemic sclerosis Phase III, you'll know ACR CRISS, you'll know mRSS, you'll know HACC, you'll know FVC, you'll know safety. And by the time we're done with the CF you'll know event rate of pulmonary exacerbations using our primary definition and at least our secondary definition.

Dae Gon Ha -- BTIG, LLC -- Analyst

Got it. Thanks very much. And then my last question is, given that you've now fully enrolled DM and there is quite a bit of significant overlap in terms of skin manifestations as well as some underlying attributes. I was wondering if you could speak to perhaps what we can glean from your SSc data to the DM data, recognizing that the endpoints are different, and maybe if you can also just give us a little bit of a primer on Total Improvement Score and how that may be different from dcSSC [Phonetic]. Thank you.

Barbara White -- Chief Medical Officer and Head of Research

Thank you, Dae Gon. Yes, we do think that there will be read through from the systemic sclerosis to the dermatomyositis study. The Total Improvement Score is also a composite score that looks holistically at improvement from baseline in these patients. And again, it is the best composite that is there for assessing overall improvement in dermatomyositis. It is developed by experts. The components of it are the ones the experts think best reflect the overall nature of the disease and the way to assess treatment effect.

And a number of those components are very similar to the components in the CRISS. There are physician global assessments, patient global assessments and overall assessment of -- in this case extra cellular manifestations, which would include skin and lung. There are assessments of muscle weakness, which if you could, is the equivalent of the mRSS assessment in scleroderma, picking a key organ and assessing its degree of involvement. And these are assessed for degree of improvement from baseline and then put into a weighted algorithm to determine improvement.

So we think that given that the nature of the actual components of that score are quite similar, that is way it is, as you look, you know it's the patient-physician global, it's a measure of key organ involvement that there should be n disability, there should be a lot of read through.

Dae Gon Ha -- BTIG, LLC -- Analyst

Great, thanks for taking the questions and look forward to the data.

Barbara White -- Chief Medical Officer and Head of Research

Thank you.


We have time for one more question from Elemer Piros of Roth Capital. Please proceed with your question.

Elemer Piros -- Roth Capital Partners -- Analyst

Yes, good morning. Thank you for taking my questions. Just a couple for Barbara. So I don't think I asked this question before, but is there a particular reason why there is no open label extension in the CF trial?

Barbara White -- Chief Medical Officer and Head of Research

Hi Elmer, this is Barbara. Yes, there is at this point. First of all, we work very extensively with the Cystic Fibrosis Foundation and their leadership and we've -- and their experience and their feeling was that perhaps that was not the appropriate thing to do at that time. And so we really followed their guidance on that one. That's the reason. Pretty much that's it.

Elemer Piros -- Roth Capital Partners -- Analyst

Okay. Okay, thank you. And I can imagine that the missing data in the scleroderma trial versus the CF trial would be treated differently. Different methodologies since one of them is a 52 week observation and the other is a collection of events over 26 weeks. Could you please tell us how they would be handled differently?

Barbara White -- Chief Medical Officer and Head of Research

Sure. So, first of all, let me start with CF. So, the primary outcome there is, as you know pulmonary exacerbations and that's also the first secondary outcome, event rate of pulmonary exacerbations. And we have very little missing data on that. That's collected even remotely. So first of all, there was essentially no COVID-19 impact on that one. So there isn't anything special we're going to need to do for that primary endpoint.

For the primary in SSc, as I said, it wasn't a lot of patients and it was at the end wasn't a lot of patients. And our approach will be to handle the missing data in COVID-19 only patients by LRCF [Phonetic], I mean that's our initial attempt at this point and handling other missing data throughout the study will be handled in standard ways and there will be a number of sensitivity analysis done handling missing data in this, that or the other way as is ordinarily done. So I don't think Elmer that there is anything particularly unusual except for the few patients that are missing because of COVID-19. We'll pool it in with LRCF [Phonetic] and do a sensitivity analysis without that.

Elemer Piros -- Roth Capital Partners -- Analyst

Okay. Well thank you so much. Barbara.


Thank you. We have reached the end of our question-and-answer session.

[Operator Closing Remarks]

Duration: 46 minutes

Call participants:

Ted Jenkins -- Senior Director, Investor Relations and Corporate Communications

Yuval Cohen -- Chief Executive Officer, Director

Barbara White -- Chief Medical Officer and Head of Research

Craig Millian -- Chief Commercial Officer

Brian Abrahams -- RBC Capital Markets -- Analyst

Maury Raycroft -- Jefferies -- Analyst

Leland Gershell -- Oppenheimer & Co Inc. -- Analyst

Dae Gon Ha -- BTIG, LLC -- Analyst

Elemer Piros -- Roth Capital Partners -- Analyst

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