From what I know, if you do the PET studies looking at cannabinoid receptors, the receptors in the brain that actually bind to components from the marijuana plant, to the tetrahydrocannabinol, you see that those receptors are much more highly expressed in situations such as PTSD than in controls. That tells you that something is going awry in the internal system.
I don't know whether with the use of drugs, which is quite common—it could be alcohol in the U.K. and it could be marijuana here—people are trying to self-medicate because they're not feeling well. I think that is a fact. People do seem to derive some benefit from it, and they're doing it because they're not feeling well.
Again, my old story is, well, let's find out: what is it exactly so that we can treat you properly?