Re: "High rates of HIV infection among injection drug users participating in needle exchange programs in Montreal: results of a cohort study".
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D004812:Epidemiologic Methods; D015658:HIV Infections / Q000453:epidemiology* / Q000209:etiology; D006679:HIV Seropositivity; D006801:Humans; D018671:Needle-Exchange Programs; D011792:Quebec; D012307:Risk Factors; D012680:Sensitivity and Specificity; D015819:Substance Abuse, Intravenous