Cepeda, M S Music does not reduce alfentanil requirement during patient-controlled analgesia (PCA) use in extracorporeal shock wave lithotripsy for renal stones. [electronic resource] - Journal of pain and symptom management Dec 1998 - 382-7 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0885-3924 Standard No.: 10.1016/s0885-3924(98)00099-2 doi Subjects--Topical Terms: AdolescentAdultAgedAlfentanil--administration & dosageAnalgesia, Patient-ControlledDose-Response Relationship, DrugFemaleHumansKidney Calculi--therapyLithotripsyMaleMiddle AgedMusic