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HIV Infections
Substance-Related Disorders
HIV Seropositivity
Intravenous Substance Abuse
Male Homosexuality
Risk-Taking
Sexual Behavior
Unsafe Sex
Bisexuality
Safe Sex
Self Disclosure
HIV Serosorting
Social Support
Heterosexuality
Patient Compliance
United States
San Francisco
New York City
Sexual Partners
Risk Factors
Co-Publications
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