No abstract available
MeSH terms
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Diagnosis, Differential
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Endoscopy, Gastrointestinal / standards*
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Esophageal Neoplasms / pathology*
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Humans
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Mass Screening / standards*
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Population Surveillance*
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Precancerous Conditions / diagnosis*
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Precancerous Conditions / epidemiology
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Stomach Neoplasms / pathology*