No abstract available
MeSH terms
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Adult
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Aged
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Esophageal Diseases / diagnosis*
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Esophageal Neoplasms / diagnosis*
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Esophagoscopy*
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Female
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Fiber Optic Technology
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Gastroscopy*
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Humans
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Male
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Middle Aged
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Stomach Diseases / diagnosis*
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Stomach Neoplasms / diagnosis*