1. Ralph H. Johnson VA Medical Center, Charleston, South Carolina.
2. Central Arkansas Veterans Healthcare System, North Little Rock, Arkansas.
3. Division of Health Services Research, UAMS Psychiatric Research Institute,College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
4. VA Medical Center and Emory University School of Medicine, Atlanta, Georgia.
5. VA Medical Center and Baylor College of Medicine, Houston, Texas.
6. Center for Health Quality, Outcomes, and Economic Research (CHQOER), HSRD Center of Excellence, Edith Nourse VA Medical Center, Bedford, Massachusetts.
7. Boston University Schools of Public Health and Medicine, Boston, Massachusetts.