7Tsai YC,Won SJ, Lin MT. Effects of morphine on immune response in rats with sciatic constriction injury.Pain, 2000,88 : 155-160.
8Rosenow DE, Albrechtsen M, Stolke D. A comparison of patient-controlled analgesia with lornoxicam versus morphine in patients undergoing lumbar disk surgery.Anesth Analg, 1998,86:1045-1050.
9Page GG,Blakely WP,Ben-Eliyahu S,et al. Evidence that postoperative pain is a mediator of the tumor-promoting effects of surgery in rats. Pain,2001,90 : 191-199.
10Helmy SA, Wahby MA, EI-Nawaway M. The effect of anaesthesia and surgery on plasma cytokine production.Anaesthesia , 1999 ,54 :733-738.