It's a fair question. I would say that we're really focused primarily on the medical evidence and what it shows about the effect of marijuana on the developing brain. We understand the other considerations. That's why we said that ideally 25 would be the right age, because brain development occurs up until that point.
I would say that in many ways we're very surprised that the medical evidence hasn't been taken into more account. Maybe it's that we're medical professionals and this is our job. We recognize some of the competing priorities in balancing the risks. I would say, from our perspective based on what we've seen in clinic and what the evidence shows, that we still think the right balance is 21, recognizing, as you say, that the competing risk would be having youth go to other sources. We think it's a little easier to try to mitigate some of those things than it is to undo the harm that potentially occurs under the age of 21. We continue to think that would be a good common ground.