Supported by the National Natural Science Foundation of China (Nos. 81573787 and 81803913),Conflicts of Interest,The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.,Author Contribution,Huang DM and Wu XK initiated, designed and supervised the study. Zhou ZM participated in patient recruitment. Dong HX and Wang Q provided the EA and sham acupuncture treatments. Dong HX and Wang Z collected the data. Yang L and Yi P analysed the data. Dong HX and Wang Q drafted the manuscript. Huang DM and Cheng L revised it. All authors have read and approved the final version of the manuscript accepted for publication. All authors accept responsibility for the accuracy and integrity of all aspects of the study.