1. Center for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, Maryland
2. Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, Maryland
3. Department of Psychiatry, University of California San Diego, La Jolla
4. Department of Family Medicine & Public Health, University of California San Diego, La Jolla
5. VA San Diego Healthcare System, San Diego, California
6. Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
7. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts