5Klepstad P, Kaasa S, Borchgrevink PC.Starting step llI opi- oids for moderate to severe pain in cancer patients doseti- tration: a systematic review[J]. Palliat Med,2011,25(5) : 424.
6Wiffen PJ, McQuay HJ. Oral morphine for cancer pain[J]. Cochrane Database Syst Rev, 2007 (4) : CD003868.
7Ljuca D, Husic S.Treatment of severe cancer pain by trans- dermal fentany[J]. Bosh J Basic Med Sci, 201 O, 10 ( 2 ) : 158.
8Jensen MP, Chang HY, Lai YH, et al. Pain in long-term breast cancer survivors: frequency, severity, and impact [J]. Pain Med,2010, 11(7) : 1 099.
9Sebastiano M, Eduardo B.Opioid switching: a systemati- cand criticalreview[J].Cancer Treat Rev, 2006,32: 304.
10CHEN X Q,JIN Y Y,TANG G. New Drug Studies(新编药物学)[ M ] . 17th ed. Beijing: People' s Medical Publishing House, 2011.
