Abdominal surgery.
D013505:Digestive System Surgical Procedures; D005767:Gastrointestinal Diseases / Q000601:surgery*; D006801:Humans; D007415:Intestinal Obstruction / Q000601:surgery*; D010437:Peptic Ulcer / Q000601:surgery*; D013274:Stomach Neoplasms
GASTROINTESTINAL DISEASES/surgery; INTESTINAL OBSTRUCTION/surgery; PEPTIC ULCER/surgery; STOMACH/neoplasms