No abstract available
MeSH terms
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Atrophy / epidemiology
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Atrophy / pathology
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Carcinoma, Squamous Cell / pathology*
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China / epidemiology
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Esophageal Neoplasms / pathology*
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Esophagitis / epidemiology
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Esophagitis / pathology
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Esophagoscopy
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Humans
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Precancerous Conditions / epidemiology
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Precancerous Conditions / pathology*
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Prevalence