1. Department of Health Care Policy; Harvard Medical School; Boston Massachusetts
2. University of Michigan; Institute for Social Research; Ann Arbor Michigan
3. Departments of Psychiatry and Family and Preventive Medicine; University of California San Diego; La Jolla California
4. VA San Diego Healthcare System; San Diego California
5. Center for the Study of Traumatic Stress; Department of Psychiatry; Uniformed Services University of the Health Sciences; Bethesda Maryland
6. National Institute of Mental Health; Bethesda Maryland
7. Departments of Social and Behavioral Sciences; and Epidemiology; Harvard School of Public Health; Boston Massachusetts
8. Department of Psychology; Harvard College; Cambridge Massachusetts