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HIV Infections
Substance-Related Disorders
Sexual Behavior
Risk-Taking
Adaptation, Psychological
Patient Compliance
Risk Reduction Behavior
Condoms
Unsafe Sex
Social Support
Male Homosexuality
Intravenous Substance Abuse
United States
Highly Active Antiretroviral Therapy
Sexual Partners
Homeless Youth
Young Adult
Health Promotion
Cross-Sectional Studies
Anti-Retroviral Agents
Co-Publications
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