title: A longitudinal investigation of powder cocaine use among club-drug using gay and bisexual men.
mesh_terms: D000328:Adult; D001727:Bisexuality / Q000523:psychology*; D003042:Cocaine / Q000008:administration & dosage*; D019970:Cocaine-Related Disorders / Q000453:epidemiology* / Q000523:psychology; D003625:Data Collection; D018451:Homosexuality, Male / Q000523:psychology*; D006801:Humans; D016014:Linear Models; D008137:Longitudinal Studies; D008297:Male; D009519:New York City / Q000453:epidemiology; D011208:Powders; D012725:Sexual Behavior / Q000523:psychology; D014505:Urban Population / Q000706:statistics & numerical data; D055815:Young Adult
chemical_list: D011208:Powders; D003042:Cocaine