1. VA Health Services Research & Development, West Haven, CT, USA
2. VA Connecticut Healthcare System, West Haven, CT, USA
3. Yale University School of Medicine, New Haven, CT, USA
4. Center for Interdisciplinary Research on AIDS, Yale University School of Public Health, New Haven, CT, USA
5. Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
6. Salem VA Medical Center, Salem, VA, USA