No abstract available
MeSH terms
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Adolescent
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Adult
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Aged
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Asian People
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Carcinoma* / epidemiology
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Carcinoma* / pathology
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Child
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Child, Preschool
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Female
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Humans
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Japan
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Korea
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Male
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Microscopy, Electron
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Middle Aged
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Nasopharyngeal Neoplasms* / epidemiology
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Nasopharyngeal Neoplasms* / pathology