1. Psychology Service VA Boston Healthcare System Boston Massachusetts USA
2. Department of Psychiatry Boston University School of Medicine Boston Massachusetts USA
3. Clinical Epidemiology Research Center VA Cooperative Studies Program West Haven Connecticut USA
4. Department of Biostatistics School of Public Health Yale University New Haven Connecticut USA
5. Department of Medicine School of Medicine Yale University New Haven Connecticut USA
6. National Center for PTSD VA Boston Healthcare System Boston Massachusetts USA
7. Center for Drug Evaluation and Research Food and Drug Administration Silver Spring Maryland USA
8. U.S. Army Research Institute of Environmental Medicine Natick Massachusetts USA
9. Research Service VA Boston Healthcare System Boston Massachusetts USA