Endoscopic sphincterotomy in the management of obstructive biliary tract diseases--a preliminary report.
D014670:Ampulla of Vater / Q000601:surgery*; D002779:Cholestasis / Q000601:surgery*; D003137:Common Bile Duct Diseases / Q000601:surgery*; D004724:Endoscopy; D006801:Humans; D008722:Methods; D011183:Postoperative Complications