Steven L. Basta
So let's take each part of that separately. So the first part on the ex U.S. strategy, at the current time, we're just focused on the U.S. market. We are not spending a significant amount of time thinking through what our launch strategy would be in Europe or in Canada. We have rights to vonoprazan for 3 territories for the U.S., for Europe and Canada. All of our commercial activities are focused on the U.S., all of the sort of focus of how do we drive our business focused on U.S. The European and Canadian opportunities represent potential upside opportunities, but they also come with the complications of the current market that you described, which is all of the issues around most favorite nations, pricing, et cetera. And so we're just not, at this point, anticipating any near-term activities in terms of our own launch in the European market. We have, in the past, had conversations with potential European partners around a potential launch. We might elect to do that at some point in time, but that's not the current strategy, but always a possibility that we might explore. The sort of second half of your question around sort of whether patients fail 1 PPI, 2 PPIs or 3 PPIs prior to getting vonoprazan, that evolves over time as physicians get more and more comfortable with this therapy. So what you're seeing in terms of patients who have been on 2 PPIs or 3 PPIs, it's actually just a reflection of the fact that 30% to 40% of patients on PPI therapy are still experiencing pain. So it's interesting when we do market research and we look at what physicians report about who the patients are that are appropriate for vonoprazan, some of them indicate a patient who's failed 1 round of PPI therapy. Some indicate patients who failed 2 rounds of PPI therapy. Some indicate a patient who's on PPI therapy and also adjunct acids. Some indicate a patient who's on PPI therapy and now is double dosing. All of those are manifestations of exactly the same phenomenon, which is a patient who's been on PPI therapy and is still experiencing heartburn. That's our core patient. All of those strategies are different things that physicians have tried or have recommended to patients that they try to manage their ongoing heartburn, but the phenomenon is exactly the same, which is you've got a patient who's on a PPI who's not adequately resolving their heartburn and they need something more, they need something better. That's the patient we're going to try to switch. And it will just vary by physician practice as to whether they have been through 2 or 3 PPI therapies over the time. Over time, where I think that goes is it gravitates toward when you fail 1 PPI, why am I switching you from omeprazole to esomeprazole . That's not going to really do anything. If you're failing on omeprazole, you should be switching to our drug. That evolution and thinking is going to come over the course of the coming years of physician experience with this drug.