time.com: Why is it that when a group of soldiers share a horrific battle experience, some are able to work through it and get on with their lives while others suffer the persistent anxiety, emotional numbness and bomb-blasted nightmares of post-traumatic stress disorder (PTSD)? The answer, researchers have long believed, is that an individual’s response to trauma — whether in battle, or as result of a natural disaster, a violent crime or some other horror — depends not only on the intensity of that trauma but also on a complex interplay of past experiences and genetic factors. A new paper, published in the current issue of the Journal of the American Medical Association, provides remarkable support for this explanation and identifies a specific gene that influences susceptibility to PTSD. [ read more ]