1. National Institute of Mental Health, Bethesda, Maryland
2. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
3. Department of Social and Behavioral Sciences, Harvard School of Public Health, Boston, Massachusetts4Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
4. Institute for Social Research, University of Michigan, Ann Arbor
5. Department of Psychiatry and Family, University of California, San Diego, La Jolla7Department of Preventive Medicine, University of California, San Diego, La Jolla8Veterans Affairs San Diego Healthcare System, San Diego, California
6. Center for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University School of the Health Sciences, Bethesda, Maryland
7. United States Army Public Health Command, Aberdeen Proving Ground, Maryland