1[1]In Bonica JJ:The management of pain[M].2nd ed.Philadelphia:Lea & Febiger,1990.400-460.
2[2]Nathan I.Chemy,Russell K.Portenoy Cancer pain:principles of assessment and syndromes.Textbook of Pain[M].4th ed.China:Science Press,2001.1017-1064.
3[3]Chemy NI.The management of cancer pain[J].CA Cancer J Clin,2000,50:70-116.
4[4]Expert Working Group of the European Association for Palliative Care Morphine in cancer pain:Modes of administration[J].BMJ,1996,312:823-826.
5[5]World Health Organization.Cancer pain relief.World Health Organization[M].Geneva,1986.
