1. Department of Health Care Policy; Harvard Medical School; Boston MA USA
2. Center for the Study of Traumatic Stress, Department of Psychiatry; Uniformed Services University of the Health Sciences; Bethesda MD USA
3. National Institute of Mental Health; Bethesda MD USA
4. Department of Psychiatry; Columbia University; New York USA
5. New York State Psychiatric Institute; New York USA
6. University of Michigan; Institute for Social Research; Ann Arbor MI USA
7. Departments of Psychiatry and Family and Preventive Medicine; University of California San Diego; La Jolla CA USA
8. VA San Diego Healthcare System; San Diego CA USA
9. Department of Psychology; Harvard University; Cambridge MA USA