1. U.S. Department of Veterans Affairs National Center on Homelessness among Veterans, Tampa, Florida
2. School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas
3. Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut
4. U.S. Department of Veterans Affairs National Center for PTSD, VA Connecticut Healthcare System, West Haven, Connecticut
5. Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina