High prevalence of HIV among men who have sex with men in Zhejiang, China: a respondent-driven sampling survey.

Objectives: To examine the prevalence of HIV and risk behaviours among men who have sex with men (MSM) and to explore the feasibility of using respondent-driven sampling in this population in order to conduct customised interventions among MSM in the future.

Design: Cross-sectional study.

Setting: Zhejiang, China.