1. Center for the Study of Traumatic Stress, Department of Psychiatry, 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 and Preventive Medicine, University of California. San Diego, La Jolla5Psychiatry Service, Veterans Affairs San Diego Healthcare System, San Diego, California
4. Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
5. National Institute of Mental Health (NIMH), Bethesda, Maryland
6. US Army Public Health Command, Aberdeen Proving Ground, Maryland
7. Institute for Social Research, University of Michigan, Ann Arbor