1. Veterans Affairs Connecticut Health Care System, West Haven, CT
2. Department of Psychiatry, Yale School of Medicine, New Haven, CT
3. National Center for PTSD, White River Junction, VT
4. US Department of Veterans Affairs National Center for PTSD, VA Connecticut Healthcare System, West Haven, CT
5. Department of Social and Behavioral Sciences, Yale School of Public Health, Laboratory of Epidemiology and Public Health, New Haven, CT