It's easier for me.
I don't think that the diagnostics or the understanding of disease has progressed enough in mental health to understand the subtlety of differences between deploying somewhere into danger versus potentially facing it on a daily basis. Dr. Merali might be able to speak to this a bit better.
There are reports that military-related post-traumatic stress disorder is different from that of somebody who, say, suffers an accident or something like that. If it is one instance of trauma versus repetitive trauma, I don't know if we know how big the differences are in terms of how the treatment would be affected or, for that matter, a research institute.