title: [Research on behavior characteristics of men who have sex with men with 50-plus years].
authors.affiliation: Department of Dematology, the Affliated Hospital of Medical College, Qingdao University, China. pytx@263.net
authors.forename: Guan-zhi
authors.initials: GZ
authors.lastname: Chen
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Li-xin
authors.initials: LX
authors.lastname: Wang
authors.forename: Bei-chuan
authors.initials: BC
authors.lastname: Zhang
authors.forename: Xiu-fang
authors.initials: XF
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D018451:Homosexuality, Male / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012725:Sexual Behavior; D011795:Surveys and Questionnaires; D055815:Young Adult