No abstract available
Publication types
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Letter
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Adolescent
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Adult
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Aged
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Aged, 80 and over
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Child
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China / epidemiology
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Female
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Humans
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Incidence
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Male
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Middle Aged
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Risk Factors
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Sexual Behavior
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Sexually Transmitted Diseases / epidemiology*
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Sexually Transmitted Diseases / etiology
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Sexually Transmitted Diseases / prevention & control
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Syphilis / epidemiology
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Syphilis / prevention & control
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Young Adult