4Rashidi AA, Anis AH, Marra CA. Do visual analogue scale (VAS) derived standard gamble (SG) utilities agree with Health Utilities Index utilities A comparison of patient and com- munity preferences for health status in rheumatoid arthritis pa- tients[J]. Health Qual Life Outcomes, 2006,20(4) : 25.
5Ramsay MA,Savege TM,Simpson BR, et al. Cont rolled seda- tion with alphaxalone and alphadolone[J]. Br Med J, 1974,22 (920) :656--659.
6Jacobs AM, Youngblood F. Opioid receptor affinity for agonist-- antagonist analgesics[J].J Am Podiatr Med Assoe, 1992, 82 (10) :520--524.