title: [The epidural morphine anesthesia for abdominal surgery of the high risk and/or aged patients].
mesh_terms: D000005:Abdomen / Q000601:surgery*; D000328:Adult; D000368:Aged; D000767:Anesthesia, Epidural; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009020:Morphine
chemical_list: D009020:Morphine