Incidence of HIV-1, syphilis, hepatitis B, and hepatitis C virus infections and predictors associated with retention in a 12-month follow-up study among men who have sex with men in Beijing, China

Ruan Y, Jia Y, Zhang X, Liang H, Li Q, Yang Y, Li D, Zhou Z, Luo F, Shi W, Shao Y. Incidence of HIV-1, syphilis, hepatitis B, and hepatitis C virus infections and predictors associated with retention in a 12-month follow-up study among men who have sex with men in Beijing, China. J Acquir Immune Defic Syndr. 2009; 52(5): 604–10.