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 Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
4. Darla Moore School of Business, University of South Carolina, Columbia
5. Department of Psychiatry, University of California San Diego, La Jolla
6. Veterans Affairs San Diego Healthcare System, La Jolla, California
7. Department of Family Medicine and Public Health, University of California San Diego, La Jolla