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Intravenous Substance Abuse
Risk-Taking
Sexual Behavior
Needle Sharing
Outcome Assessment (Health Care)
Substance-Related Disorders
HIV Infections
Cocaine-Related Disorders
Sexually Transmitted Diseases
Analysis of Variance
Risk Factors
Urban Population
Crack Cocaine
Philadelphia
AIDS Serodiagnosis
Aftercare
Cognitive Therapy
Behavior Therapy
HIV Seropositivity
Counseling
Co-Publications
3
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