1. VHA VISN 17 Center of Excellence and the Central Texas VA Healthcare System, Waco, TX, USA
2. Department of Psychiatry and Behavioral Sciences, Dell Medical School of the University of Texas at Austin, Austin, TX, USA
3. National Center for PTSD, VA Boston Healthcare System, Boston, MA, USA
4. National Center for PTSD, VA Boston Healthcare System, and Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA