6Goudas LC, Bloch R, Gialeli - Goudas M, et al. The epidemiology of cancer pain [ J 1 ~ Cancer Invest, 2005, 23 (2) : 182.
7Svendsen KB, Andersen S, Arnason S, et al. Breakthrough pain in malignant and non - malignant diseases: a review of prevalence, characteristics and mechanisms [ J ]. Eur J Pain, 2005, 9(2) :195.
8Mystakidou KiParpa E, Tsilika E, et al. Pain management of cancer patients with transdermal fentanyl : a study of 1 828 step Ⅰ, Ⅱ ,& Ⅲ transfers[J]. J Pain,2004,5(2) :119.
