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Intravenous Substance Abuse
Risk-Taking
Social Support
Needle Sharing
Sexual Behavior
Unsafe Sex
HIV Infections
Substance-Related Disorders
Baltimore
Sexual Partners
Drug Users
Young Adult
Peer Group
Risk Factors
Logistic Models
Interviews as Topic
Urban Population
Cross-Sectional Studies
Needle-Exchange Programs
HIV Seropositivity
Co-Publications
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