Christopher Boerner
Analyst
Sure. Maybe I'll start, Geoff. Thanks for the question. So as we look at access really across all of these launches, we feel very good about where we are from an access standpoint. And I'll start with cell therapy. Cell therapy actually, I think, is a very, very good story. We've seen no issues with respect to access constraints for our cell therapy launches. We've discussed the supply constraints. But the launches have gone off really without a hitch from a supply -- from an access standpoint. And in fact, if you look at the class of agents more generally, if you go back a couple of years, as you well know, access and reimbursement were significant areas of concerns. And I would say largely for the class of agents, we've been trending in the right direction. But we see no issues on our cell therapy assets. As we switch gears and you mentioned Zeposia, obviously, the focus is on UC. But very quickly on MS, I feel very good about the access position there. We have very broad coverage in MS, so really not a significant concern on the MS side. In UC, we've been very clear that we have to execute a diligent effort around access over the course of this year. What I can say coming into 2022 is we have very broad formulary coverage for Zeposia. Now how restrictive that formulary coverage is, it varies by plan. And for the course of this year, for those patients with less restricted access, the focus is going to be on converting those patients from starter or bridge programs to commercial drug, and do so very quickly. For patients with more restricted access, which unsurprisingly for our first full year in the market, most patients have multiple step edits, the focus is going to be on working through those restrictions, and that's going to take more time. What I can say, though, in any case, is that on Zeposia, we're continuing to build volume over the course of this year. The plan has been and continues to be to then leverage that volume to move Zeposia into an earlier access position as we head into 2023, and we're very much on track to do that.