Estimating HIV prevalence in Switzerland.
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Ledergerber
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D001727:Bisexuality; D015331:Cohort Studies; D004812:Epidemiologic Methods; D015528:HIV Seroprevalence; D006716:Homosexuality; D006801:Humans; D008297:Male; D015819:Substance Abuse, Intravenous; D013557:Switzerland / Q000453:epidemiology