1. Department of Social and Behavioral Sciences, Yale School of Public Health, New Haven, Connecticut, USA
2. Center for Interdisciplinary Research on AIDS, New Haven, Connecticut, USA
3. Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
4. Department of Behavioral and Social Sciences, Brown University School of Public Health, Providence, Rhode Island, USA
5. Providence/Boston Center for AIDS Research, Rhode Island, USA
6. Harvard T.H. Chan School of Public Health, Department of Epidemiology, Boston, Massachusetts, USA
7. Yale School of Medicine, Department of Internal Medicine, New Haven, Connecticut, USA