1. Veterans Affairs San Diego Healthcare System, U.S. Department of Veterans Affairs, San Diego, California, USA.
2. Department of Psychiatry, University of California San Diego, San Diego, California, USA.
3. National Center for PTSD, Behavioral Science Division, VA Boston Healthcare System, Boston, Massachusetts, USA.
4. Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, USA
5. Department of Medicine, University of California San Diego, San Diego, California, USA.
6. VA Puget Sound Health Care System, US Department of Veterans Affairs, Seattle, Washington, USA.
7. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA.
8. Department of Psychology, Louisiana State University, Baton Rouge, Louisiana, USA.