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Kenya
HIV-1
HIV Infections
Sexually Transmitted Diseases
Urethritis
Ulcer
Gonorrhea
Chlamydia Infections
Vaginal Discharge
Cohort Studies
Prospective Studies
Risk Factors
Multivariate Analysis
Incidence
HIV Seronegativity
HIV Seropositivity
Sexual Behavior
Prostitution
Risk-Taking
AIDS Vaccines
Co-Publications
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