No abstract available
MeSH terms
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Aged
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Aged, 80 and over
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Bile Duct Neoplasms / complications*
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Cholangiography
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Cholestasis / diagnostic imaging*
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Cholestasis / etiology
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Contrast Media
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Hepatic Duct, Common*
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Humans
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Klatskin Tumor / complications*
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Male
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Ultrasonography