5Yu S,Wang XS,Cheng Y,et al.Special aspects of cancer pain management in a Chinese general hospital[J].Eur J Pain,2001,5Suppl A:15-20.
6Nielsen C K,Ross FB,Lotfipour S,et al.Oxycodone and morphine have distinctly different pharmacological profiles:radioligand binding and behavioural studies in two rat models of neuropathic pain[J].Pain,2007,132(3):289-300.