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Netherlands
HIV Infections
Acquired Immunodeficiency Syndrome
Sexually Transmitted Diseases
Cohort Studies
Risk Factors
Incidence
Prevalence
Prospective Studies
Time Factors
Intravenous Substance Abuse
Male Homosexuality
Sexual Behavior
Homosexuality
Risk-Taking
HIV Seropositivity
HIV-1
Sexual Partners
CD4 Lymphocyte Count
Disease Progression
Co-Publications
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