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. Institute for Social Research, University of Michigan, Ann Arbor
5. Department of Psychology, Harvard University, Cambridge, Massachusetts
6. Department of Psychiatry, University of California, San Diego, La Jolla
7. Department of Family and Preventive Medicine, University of California, San Diego, La Jolla
8. VA San Diego Healthcare System, La Jolla, California