1. Department of Psychiatry, Boston University Chobanian & Avedisian School of Medicine , Boston, Massachusetts , USA
2. National Center for Posttraumatic Stress Disorder, VA Boston Healthcare System , Boston, Massachusetts , USA
3. Department of Psychology, Université du Québec à Trois-Rivières , Trois-Rivières, Québec , Canada
4. Research Center, Institut Universitaire en Santé Mentale de Montréal , Montréal, Québec , Canada
5. School of Human Development & Family Studies, Oregon State University , Corvallis, Oregon , USA
6. Massachusetts Veterans Epidemiology Research and Information Center, VA Boston Healthcare System , Boston, Massachusetts , USA
7. Department of Epidemiology, Boston University School of Public Health , Boston, Massachusetts , USA