1. Perelman School of Medicine, The University of Pennsylvania, Philadelphia, Pennsylvania, USA.
2. Denver Research Institute, Denver, Colorado, USA.
3. VA San Diego Health Care System, Center of Excellence for Stress and Mental Health and National Center for PTSD, San Diego, California, USA.
4. University of California San Diego School of Medicine, La Jolla, California, USA.
5. Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
6. VA Palo Alto Health Care System, Menlo Park, California, USA.
7. Rocky Mountain MIRECC Rocky, Rocky Mountain Regional VA Medical Center, Aurora, Colorado, USA.
8. University of Colorado School of Medicine, Aurora, Colorado, USA.