Protocol on transcranial alternating current stimulation for the treatment of major depressive disorder: a randomized controlled trial oleh Hong-Xing Wang, Kun Wang, Wen-Rui Zhang, Wen-Feng Zhao, Xiao-Tong Yang, Li Wang, Mao Peng, Zhi-Chao Sun, Qing Xue, Yu Jia, Ning Li, Kai Dong, Qian Zhang, Shu-Qin Zhan, Bao-Quan Min, Chun-Qiu Fan, Ai-Hong Zhou, Hai-Qing Song, Lu Yin, Tian-Mei Si, Jing Huang, Jie Lu, Hai-Xia Leng, Wei-Jun Ding, Yuan Liu, Tian-Yi Yan, Yu-Ping Wang, Li-Min Chen