1. Department of Sociology, Temple University, Philadelphia, Pennsylvania, USA
2. College of Public Health, School of Social Work, Temple University, Philadelphia, Pennsylvania, USA
3. School of Social Work, Columbia University, New York, New York, USA
4. The Global Forum on MSM & HIV (MSMGF), Oakland, California, USA
5. School of Public Health, Drexel University, Philadelphia, Pennsylvania, USA
6. Wake Forest University Medical Center, Winston-Salem, North Carolina, USA
7. School of Public Health, Indiana University-Bloomington, Bloomington, Indiana, USA
8. College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, Florida, USA
9. Columbia University Medical Center, New York, New York, USA