1. Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
2. HIV Center for Clinical and Behavioral Studies, Division of Gender, Sexuality, and Health, Columbia University and New York Psychiatric Institute, New York, NY, USA
3. APAIT/Special Service for Groups, Los Angeles, CA, USA
4. Sol Price School of Public Policy, University of Southern California, Sacramento, CA, USA