title: GASTROINTESTINAL AND BILIARY TRACT SURGERY.
mesh_terms: D001659:Biliary Tract; D001662:Biliary Tract Surgical Procedures; D005767:Gastrointestinal Diseases; D006801:Humans; D013514:Surgical Procedures, Operative
keywords: BILIARY TRACT; GASTROINTESTINAL DISEASES; SURGERY, OPERATIVE