No abstract available
MeSH terms
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Bronchial Neoplasms / epidemiology
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Carcinoma, Squamous Cell / diagnosis
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Carcinoma, Squamous Cell / epidemiology*
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Endoscopy / methods
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Esophageal Neoplasms / epidemiology
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Head and Neck Neoplasms / diagnosis
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Head and Neck Neoplasms / epidemiology*
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Humans
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Laryngeal Neoplasms / epidemiology
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Mouth Neoplasms / epidemiology
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Neoplasms, Multiple Primary / diagnosis
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Neoplasms, Multiple Primary / epidemiology*
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Neoplasms, Second Primary
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Pharyngeal Neoplasms / epidemiology
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Prospective Studies
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Retrospective Studies
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Risk