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Male Homosexuality
Sexual Behavior
Risk-Taking
Safe Sex
HIV Infections
Sexually Transmitted Diseases
Kaposi's Sarcoma
Gonorrhea
Netherlands
Ethiopia
Risk Factors
Cohort Studies
Incidence
Prevalence
Highly Active Antiretroviral Therapy
HIV-1
Sexual Partners
Human Herpesvirus 8
Antibodies, Viral
HIV Seropositivity
Co-Publications
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