1. Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina; Charleston; South Carolina USA
2. National Center for PTSD at VA Boston Healthcare System; Boston; MA USA
3. Boston University School of Medicine; Boston Massachusetts USA
4. Department of Epidemiology; Columbia University; New York New York USA
5. Geisel School of Medicine at Dartmouth; Hanover New Hampshire USA
6. National Center for PTSD; White River Junction Vermont USA