No abstract available
MeSH terms
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Female
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Head and Neck Neoplasms / epidemiology
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Head and Neck Neoplasms / etiology*
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Humans
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Male
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Mouth Neoplasms / epidemiology
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Mouth Neoplasms / etiology
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Nasopharyngeal Neoplasms / epidemiology
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Nasopharyngeal Neoplasms / etiology