No abstract available
MeSH terms
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Aged
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Bile Duct Neoplasms / diagnosis*
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Bile Duct Neoplasms / surgery*
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Bile Ducts, Extrahepatic*
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Carcinoma, Papillary / diagnosis*
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Carcinoma, Papillary / surgery*
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Cholangiopancreatography, Endoscopic Retrograde
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Endosonography
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Humans
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Male
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Tomography, X-Ray Computed