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Male Homosexuality
Risk-Taking
Unsafe Sex
Sexual Behavior
Health Knowledge, Attitudes, Practice
Rape
Spouse Abuse
HIV Infections
Anus Diseases
Cocaine-Related Disorders
AIDS Vaccines
Crack Cocaine
Anti-Retroviral Agents
Receptors, CCR5
Receptors, CXCR4
Sexual Partners
HIV Seropositivity
HIV Seronegativity
Cohort Studies
Sex Counseling
Co-Publications
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