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Los Angeles
United States
California
HIV Infections
Syphilis
Sexually Transmitted Diseases
Acquired Immunodeficiency Syndrome
Male Homosexuality
Sexual Behavior
Risk-Taking
Intravenous Substance Abuse
Questionnaires
Prevalence
Risk Factors
Incidence
Sexual Partners
HIV-1
AIDS Serodiagnosis
Mass Screening
Population Surveillance
Co-Publications
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