1 Department of Anaesthesiology, West China Hospital of Sichuan University, Sichuan Province, Chengdu, 610041, China. Electronic address: 604680675@qq.com.
2 Department of Cardio-Thoracic Surgery, Chengdu Second People's Hospital, Sichuan Province, Chengdu, 610017, China. Electronic address: dr.sdmch@aol.com.
3 Department of Anaesthesiology, West China Hospital of Sichuan University, Sichuan Province, Chengdu, 610041, China. Electronic address: yangjing@wchscu.cn.