Hanbin Xie1, Weiqiang Chen1, Jun Liu1, Juan Li2, Shangrong Li3. 1. Department of Anesthesiology, 3rd Affiliated Hospital, Sun Yat-sen University, 600 Tianhe Road, Guangzhou City, Guangdong Province, China. 2. Guangzhou Best Estimate Science and Technology Ltd., Guangzhou City, Guangdong Province, China. 3. Department of Anesthesiology, 3rd Affiliated Hospital, Sun Yat-sen University, 600 Tianhe Road, Guangzhou City, Guangdong Province, China. Electronic address: lishangr@mail.sysu.edu.cn.