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Italy
HIV Infections
Substance-Related Disorders
Hepatitis C
Hepatitis B
Acquired Immunodeficiency Syndrome
Cross-Sectional Studies
Prevalence
Risk Factors
Young Adult
HIV
Drug Users
Sexual Partners
AIDS Serodiagnosis
Intravenous Substance Abuse
Questionnaires
Sexual Behavior
Condoms
Male Homosexuality
Risk-Taking
Co-Publications
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5
3
2
1
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