1. Department of Psychiatry, Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, Maryland
2. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
3. Department of Psychiatry, University of California–San Diego, La Jolla4Department of Family Medicine and Public Health, University of California–San Diego, La Jolla
4. Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
5. University of California–San Diego, La Jolla7Veterans Affairs San Diego Healthcare System, La Jolla, California8National Institute of Mental Health, Bethesda, Maryland
6. US Army Public Health Command, Aberdeen Proving Ground, Maryland
7. University of Michigan, Institute for Social Research, Ann Arbor