1. Division of Epidemiology, New England Research Institutes, Inc., Watertown, Massachusetts.
2. Executive Division, National Center for PTSD, VA Medical Center, White River Junction, Vermont.
3. Department of Psychiatry, Geisel School of Medicine of Dartmouth, Hanover, New Hampshire.
4. Behavioral Science Division, National Center for PTSD at VA Boston, Boston, Massachusetts.
5. Department of Psychiatry, Boston University School of Medicine, Boston, Massachusetts.