Hepatobiliary surgery.
D001660:Biliary Tract Diseases / Q000175:diagnosis / Q000601:surgery*; D002769:Cholelithiasis / Q000601:surgery; D004724:Endoscopy; D004932:Esophageal and Gastric Varices / Q000601:surgery; D006801:Humans; D006975:Hypertension, Portal / Q000601:surgery; D008107:Liver Diseases / Q000601:surgery*; D010195:Pancreatitis / Q000601:surgery