title: [Postoperative analgesia with epidural morphine chloride in upper abdominal surgery].
mesh_terms: D000005:Abdomen / Q000601:surgery*; D006801:Humans; D007268:Injections, Epidural; D009022:Morphine Derivatives / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D009022:Morphine Derivatives
vernacular_title: Analgesia postoperatoria con cloruro mórfico epidural en cirugía abdominal alta.