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Lau JT, Wang M, Wong HN, Tsui HY, Jia M, Cheng F, Zhang Y, Su X, Wang N. Prevalence of bisexual behaviors among men who have sex with men (MSM) in China and associations between condom use in MSM and heterosexual behaviors. Sex Transm Dis. 2008 Apr;35(4):406–13. doi: 10.1097/olq.0b013e318164467f. PMID: 18362864. |