title: Self-reported changes in sexual behaviors among homosexual and bisexual men from the San Francisco City Clinic cohort.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission; D002140:California; D006716:Homosexuality; D006801:Humans; D008297:Male; D012306:Risk; D012725:Sexual Behavior; D011795:Surveys and Questionnaires