Jeffrey M. Dayno
Management
Yeah, good morning Franc, thanks for the question. Yeah, so in terms of IH I think in terms of epidemiology, it starts with so the claims data and the number of diagnosed patients. Based on ICSD criteria in the range of 30,000 to 40,000 patients. Going through the literature in terms of the broader epidemiology, it's potentially up to 70,000 to 80,000 patients in the U.S. And you raise a good point, it obviously and in sleep medicine community, it's an active discussion, idiopathic hypersomnia exists along a continuum or a spectrum in terms of patients with type one narcolepsy, type two, and then IH. And I think IH as another central disorder of hypersomnolence, there is some of that overlap you're alluding to, especially within T2. However, you lean on the clinical diagnosis, and the clinicians making the diagnosis supported by sleep studies. And, they're -- ICSD too differentiate it between IH patients with long sleep time, and those without. Actually the ICSD, three criteria sort of took that away. So there is some of that difference in terms of the clinical phenotype, but ultimately it's how the clinicians make the diagnosis. Obviously, in our clinical trials, we lean on the formal diagnosis of IH for patients to be eligible. And, then they're managed in terms of by the sleep medicine community. What's also interesting is when speaking to the KOLs, they say that a lot of them have as many patients with IH per ICSD criteria in their clinics, as they do with narcolepsy. So we think it's obviously a significant opportunity for Pitolisant going forward. And as I mentioned before, we're focused on the execution of the INTUNE trial in pursuit of the indication.