1[2]HAN JS,Wiang Q. Mobilization of specific neu- ropeptides by peripheral stimulation of identified frequencies[J]. News Physiol Sci, 1992,7:176- 180.
3[4]Brosseau L, Milne S, Kobinson V, et al. Efficacy of the transcutaneous electrical nerve stimulation for the treatment of chronic low back pain: a metra- analysis[J]. Spine,2002,27:596-603.