title: Are the recent increases in sexual risk behavior among older or younger men who have sex with men? Answer: both.
authors.forename: Sanny Y
authors.initials: SY
authors.lastname: Chen
authors.forename: Darlene
authors.initials: D
authors.lastname: Weide
authors.forename: Willi
authors.initials: W
authors.lastname: McFarland
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D015658:HIV Infections / Q000635:transmission*; D018451:Homosexuality, Male / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012309:Risk-Taking; D012725:Sexual Behavior / Q000706:statistics & numerical data*