On that last question, I think the answer is no, and it's not just physicians. As we've talked about, this is really all health care providers, because not only is the prescribing expanding to go beyond physicians to include nurses and pharmacists, but also we work as teams. All the health care professionals involved in the teams need to have that education.
Should there be more regulation? I would say no. I think there are other ways you can get at this without regulating it. It's an option, but I would say there are other ways we can do it that are probably more effective.
If I could just add something, you asked the question about agricultural versus human use. I would basically echo what Andrew said, but I think both really are important. Depending on what you read, some sources will say that it's agricultural use predominantly; others will say human use is the major cause. The reality is that both are significantly important, so it really is important and critical to address both spheres.