No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adolescent
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Adult
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Age Factors
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Bisexuality / psychology*
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Cohort Studies
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Educational Status
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HIV Seroprevalence*
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Homosexuality, Male / psychology*
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Humans
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Male
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Patient Dropouts / classification*
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Patient Dropouts / statistics & numerical data
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Substance Abuse, Intravenous / psychology*
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United States / epidemiology