1 Department of Critical Care Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Xiang, Chengdu, 610041, Sichuan, China; West China School of Medicine, Sichuan University, No. 37, Guoxue Xiang, Chengdu, 610041, Sichuan, China.
2 Department of Cardiovascular Surgery, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, No. 37, Guoxue Xiang, Chengdu, 610041, Sichuan, China.
3 Department of Critical Care Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Xiang, Chengdu, 610041, Sichuan, China. Electronic address: drpengji@wchscu.cn.