No abstract available
MeSH terms
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Aged
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Biopsy / methods*
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Duodenal Neoplasms / diagnostic imaging
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Duodenal Neoplasms / pathology*
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Gastrointestinal Stromal Tumors / diagnostic imaging
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Gastrointestinal Stromal Tumors / pathology*
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Humans
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Natural Orifice Endoscopic Surgery