Myofascial acupuncture versus routine acupuncture for mechanical neck pain: a protocol for a multicentre randomised controlled trial oleh Yang Zhang, Yang Yang, Chang Xu, Na Li, Xing-Hua Qiu, Xing-Yue Yang, Yu-Yu Wang, Su-Ling Tian, Yan-Bin Yan, An-Ping Xu, Fei Fu, Feng-Yun Wen, Yu-Qin Zhang, Zhi-Wen Yang, Qian-Hui Sun, Xiao-Ling Wu, Xing-Ye Dai, Kai Cheng