“…The studies in this review either recruited the study population based on likely exposure to trauma, measured exposure to traumatic events, or measured PTSD symptoms (or a mix of these). Seven studies directly measured exposure to traumatic events (21,22,25,30,35,40,44,47). Thirteen studies directly measured PTSD symptoms (22,24,29,34,40,42), and of these, seven used PTSD score as selection criteria (29,30,(33)(34)(35)37,43).…”