authors Pan, Stephen, PhD Carpiano, Richard M Li, Dongliang Zhang, Zheng Schechter, Martin T Spittal, Patricia M Ruan, Yuhua
has subject area Adolescent Adult China Condoms Cross-Sectional Studies Ethnicity HIV Infections Homosexuality, Male Humans Male Prevalence Risk-Taking Sexual Behavior Substance-Related Disorders Surveys and Questionnaires
