1. Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
2. Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, USA
3. U.S. Department of Veterans Affairs, National Center for PTSD Evaluation Division, West Haven, CT, USA
4. Department of Psychiatry, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
5. Department of Family Medicine, East Tennessee State University, Quillen College of Medicine, USA