No abstract available
Publication types
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Letter
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Biliary Tract Neoplasms / economics*
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Biliary Tract Neoplasms / immunology
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Carcinoembryonic Antigen / analysis
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Chemistry, Clinical / methods*
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Cholecystokinin
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Cost Control
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Humans
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Research Design
Substances
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Carcinoembryonic Antigen
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Cholecystokinin