No abstract available
Publication types
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Comparative Study
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English Abstract
MeSH terms
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Duodenal Diseases / diagnosis
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Endoscopes*
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Esophageal Diseases / diagnosis
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Esophagoscopes
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Fiber Optic Technology* / instrumentation*
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Gastrointestinal Diseases / diagnosis*
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Gastroscopes
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Humans
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Methods
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Stomach Diseases / diagnosis