Sorry, I missed the early part, but it's a tremendous conversation, although I have to say that the conversations that we've had with other experts up to and including now leaves a bit of confusion in terms of where we're going with this. As an example, I looked at some data from the University of Texas at Dallas about brain mapping and how the reward system of the brain is changed with continuous use of marijuana, or cannabis. We hear all the good things that are happening for veterans, and that's why we're here, to make sure that something efficacious is happening for them. On this whole notion of marijuana, I see that it has a 6,000-year history that got interrupted in the early 20th century. What can we say at the moment about our understanding of the impacts on the brain through the scanning and the imaging and the other things that are occurring? Can we say much for sure about what the outcome would be of a continuous use of cannabis?
Who would like to answer that?
Dr. Hurd.