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Male Homosexuality
Sexual Behavior
Unsafe Sex
Risk-Taking
Questionnaires
New South Wales
Australia
HIV Infections
Anus Neoplasms
Papillomavirus Infections
Incidence
Cohort Studies
Risk Factors
Prevalence
Urban Population
Prospective Studies
Sexual Partners
Young Adult
HIV Seropositivity
HIV Seronegativity
Co-Publications
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