title: Drug use and HIV risk among male sex workers: results of two samples in San Francisco.
authors: Institute for Scientific Analysis, Alameda, CA 94501, USA.
authors: D
authors: D
authors: Waldorf
mesh_terms: D015658:HIV Infections / Q000523:psychology / Q000635:transmission*; D015528:HIV Seroprevalence; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D012309:Risk-Taking; D012495:San Francisco; D011477:Sex Work; D019966:Substance-Related Disorders / Q000523:psychology*