Endoscopic treatment of biliary tract disease.
D000368:Aged; D014670:Ampulla of Vater / Q000601:surgery*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D042882:Gallstones / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D007430:Intraoperative Care; D008875:Middle Aged