No abstract available
MeSH terms
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Biopsy
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Coloring Agents
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Endoscopes
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Endoscopy / history
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Endoscopy / trends*
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Esophagoscopy / methods
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Fiber Optic Technology / instrumentation
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Gastroenterology / trends*
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Gastrointestinal Diseases / diagnosis*
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Gastroscopy / methods
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Hemorrhage / diagnosis
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Humans
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Hydrogen-Ion Concentration