No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Aged
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Female
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HIV Infections / epidemiology
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Hepatitis B / epidemiology*
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Hepatitis B Surface Antigens / analysis*
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Humans
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Italy / epidemiology
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Male
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Middle Aged
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Sex Factors
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Sexually Transmitted Diseases, Viral / epidemiology
Substances
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Hepatitis B Surface Antigens