8CHIA Yuan-yi, CHOW Lok-hi, HUNG Chun-ehieh, et al. Gender and pain upon movement are associated with the requirements for postoperative patlent-controlled iv analgesia: a prospective survey of 2,298 Chinese patients [J]. Canadian Journal of Anesthesia, 2002, 49(3): 249 -255.
9CEPEDA M S, CARB D B. Women experience more pain and require more morphine than men to achieve a similar degree of analgesia [J].Anesth Analg, 2003, 97(5): 1464 - 1468.
10CICCONE G K, HOLDCROFT A. Drugs and sex differences: a review of drugs rehting to anaesthesia [J]. Br J Anaesth, 1999, 82(2):255 - 65.