title: Relief of pain by infusion of morphine after operation.
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D007263:Infusions, Parenteral; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000628:therapy*
chemical_list: D009020:Morphine