It's always very difficult to.... Actually, they could exist, but I'm not aware of longitudinal studies that are looking at before and after, but there's a lot of comparison between the normal population and the population that has been exposed to stress, and comparisons between people who have been exposed to combat stress versus other types of stress. As you may imagine, it's more difficult to do the longitudinal study, the before and after, but there might be some studies that I'm unaware of, quite frankly, I think it would actually be an excellent thing to look at.
Because again, I'm really convinced, from what I've read, that there must be some neurobiological basis for the susceptibility of some individuals but not others to develop distress disorders. If we could develop either bar markers or imaging that would allow us to screen these people beforehand, it would be great. I'm sure there must be interventions in that area. I'm just not aware of them.