Published on in Vol 17, No 4 (2015): April
1 Department of Health Behavior, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
2 Icahan School of Medicine at Mount Sinai, New York, NY, United States
3 Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, San Francisco, CA, United States
4 Department of Health Policy and Management, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
5 Division of Infectious Diseases, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
6 Guangdong Provincial Center for Skin Diseases and STI Control & Prevention, Guangzhou, China
7 Guangtong – Lingnan MSM Community Support Center, Guangzhou, China