1. Risk Factors for Course of Posttraumatic Stress Disorder Among Vietnam Veterans: A 14-Year Follow-Up of American Legionnaires Koenen, Karestan C.; Stellman, Jeanne M.; Stellman, Steven D.; Sommer Jr., John F. 2003 Articles EpidemiologyPost-traumatic stress disorderVeteransVietnam War, 1961-1975