No abstract available
MeSH terms
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Aged
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Biopsy, Needle / instrumentation*
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Biopsy, Needle / methods
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Digestive System / diagnostic imaging
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Digestive System / pathology
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Endoscopes, Gastrointestinal*
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Endoscopy, Gastrointestinal / methods
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Equipment Design
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Gastrointestinal Diseases / pathology
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Humans
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Middle Aged
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Needles
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Ultrasonography, Interventional*