1. Ralph H. Johnson VA Medical Center, Charleston, South Carolina, USA.
2. Medical University of South Carolina, Charleston, South Carolina, USA.
3. Edward Hines Junior VA Hospital Cooperative Studies Program, Hines, Illinois, USA.
4. Cooperative Studies Program Clinical Research Pharmacy Coordinating Center, Albuquerque, New Mexico, USA.
5. Miami VA Healthcare System, Miami, Florida, USA.
6. University of Colorado School of Medicine, Aurora, Colorado, USA.
7. VA Puget Sound Healthcare System, Seattle, Washington, USA.
8. VA Salt Lake City Health Care System, Salt Lake City, Utah, USA.
9. Michael E. DeBakey VA Health System, Houston, Texas, USA.
10. James A. Haley Veterans' Hospital, Tampa, Florida, USA.
11. Rocky Mountain MIRECC for Suicide Prevention, Denver, Colorado, USA.
12. Roper St. Francis Healthcare, Charleston, South Carolina, USA.