BILIARY TRACT PROBLEMS IN THE AGED.
D001650:Bile Duct Neoplasms; D001659:Biliary Tract; D002758:Cholangiography; D002765:Cholecystography; D005705:Gallbladder Diseases; D005853:Geriatrics; D006801:Humans
BILE DUCT NEOPLASMS; CHOLANGIOGRAPHY; CHOLECYSTOGRAPHY; GALLBLADDER DISEASES; GERIATRICS