Thank you very much, Madame Chair.
Thank you to the witnesses for being here today.
I want to continue with your point about the 50,000 marijuana users through the medical process and that we've never really monitored what they do. I wonder if you could talk a little bit more about that, because it's a concern to me that we introduce a substance that we don't control, but then we don't monitor it either. We claim that it has successes, but we can't prove it. So I appreciate what you said today, but the reality is that we can't prove anything right now. Talk a little more about how we go about proving all of this, because there is no way of doing it.