1 Department of anesthesiology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, China.
2 Department of Anesthesiology, Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Electronic address: zhang_ws@scu.edu.cn.