Forneris CA, Gartlehner G, Brownley KA, Gaynes BN, Sonis J, Coker-Schwimmer E, Jonas DE, Greenblatt A, Wilkins TM, Woodell CL, Lohr KN. Interventions to prevent post-traumatic stress disorder: a systematic review. Am J Prev Med. 2013 Jun;44(6):635-50. doi: 10.1016/j.amepre.2013.02.013