title: Comparison of continuous and intermittent papaveretum after cholecystectomy.
mesh_terms: D002763:Cholecystectomy; D006801:Humans; D007263:Infusions, Parenteral; D009892:Opium / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D009892:Opium