8VickersA,GoyalN,Hariand R,et al.Do certain countries produce only positive results? A systematic review of controlled trails[J].Control Clin Trails,1998,19(2):159.
9Tang Jin Ling,Zhan Si Yan,Edzard Ernst.Review of randomized trials of traditional Chinese dicine[J].BMJ,1999,319:160.
10Xu Z, Chen SR, Eisenach J, et al. Role of spinal muscarinic and nicotinic receptors in clinidine - induced nitric oxide release in a fat model of meuropathic pain [ J ] . Brain Res, 2000,86(2) :390.