No abstract available
MeSH terms
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Adenocarcinoma / diagnosis
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Adenocarcinoma / pathology*
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Aged
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Ampulla of Vater / injuries
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Bile Duct Neoplasms / diagnosis
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Bile Duct Neoplasms / pathology*
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Biopsy / instrumentation
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Biopsy / methods*
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Cholangiopancreatography, Endoscopic Retrograde
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Humans
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Male