Qi Chen1, Ji-Hong Jiang2, Bin Yang3. 1. Department of Anesthesiology, Chongqing University Cancer Hospital, Chongqing, China. 2. Department of Anesthesiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai. China. 3. Department of Anesthesiology, The First Affiliated Hospital of Xiamen University, Xiamen, China. Electronic address: yangbin4332@outlook.com.