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Netherlands
Intravenous Substance Abuse
Prostitution
Sexual Behavior
Homosexuality
Risk-Taking
HIV Infections
Substance-Related Disorders
Acquired Immunodeficiency Syndrome
Sexually Transmitted Diseases
Cohort Studies
Risk Factors
Prevalence
Cross-Sectional Studies
Incidence
HIV Seropositivity
HIV Seroprevalence
Sexual Partners
Methadone
Male Contraceptive Devices
Co-Publications
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