A new roentgen sign in extrahepatic biliary tract disease.
BROWN
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HARPER
F G
FG
D017734:Bile Ducts, Extrahepatic; D001659:Biliary Tract / Q000000981:diagnostic imaging*; D001660:Biliary Tract Diseases; D006801:Humans; D010808:Physical Examination; D011859:Radiography