No abstract available
MeSH terms
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Acquired Immunodeficiency Syndrome / epidemiology*
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Adolescent
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Antibodies, Bacterial / analysis
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Antibodies, Viral / analysis
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HIV / immunology
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Hepatitis B / epidemiology*
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Hepatitis B Antibodies / analysis
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Homosexuality
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Humans
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Male
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Prisoners*
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Sicily
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Substance-Related Disorders / epidemiology
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Syphilis / epidemiology*
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Treponema pallidum / immunology
Substances
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Antibodies, Bacterial
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Antibodies, Viral
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Hepatitis B Antibodies