Are the recent increases in sexual risk behavior among older or younger men who have sex with men? Answer: both.
Chen
Sanny Y
SY
Weide
Darlene
D
McFarland
Willi
W
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*