5Warlleld CA. Controlled - release morphine tablets in patients with chronic cancer pain: a narrative review of controlled clinical trials. Cancer, 1998,82(12) :2299.
6Chumbley GM, Hall GM ,Salmon P, et al. Patient- controlled analgesia:an assessment by 200 patients. Anaesthesia, 1998,53 ( 3 ) :216.
7Egan K J, Ready LB. patient satisfaction with intravenous PCA or epidural morphine. Can J Anaesthesia, 1994,41 ( 1 ) :6.
8Veyckemans F. Analgesia controlled by the patient in pediatrics.Arch Pediatric, 1997,4 (3) :289.
10Warfield CA.Controlled-release morphine tablets in patients with chronic cancer pain: a narrative review of controlled clinical trials.Cancer,1998,82(12):2299.
