Risk factors for the development of posttraumatic stress disorder following combat trauma: a semiprospective study - Zohar, J; Fostick, L; Cohen, A; Bleich, A; Dolfin, D; Weissman, Z; Doron, M; Kaplan, Z; Klein, E; Shalev, AY; Israeli Consortium on PTSD (J Clin Psychiatry, 2009)