1. The Fenway Institute, Fenway Health, Boston, Massachusetts, USA.
2. Department of Health Law, Policy and Management, Boston University School of Public Health, Boston, Massachusetts, USA.
3. Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA.
4. Harvard Medical School, Boston, Massachusetts, USA.
5. Infectious Disease Division, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.