1Department of Respiratory and Critical Care Medicine, Chengdu Second People's Hospital, Chengdu, Sichuan 610017, China
2Department of Cardio-Thoracic Surgery, Chengdu Second People's Hospital, Chengdu, Sichuan, 610017, China
3Department of Neurology, West China Hospital of Sichuan University, Sichuan, Chengdu 610041, China
4Department of Emergency, Chengdu Second People's Hospital, Chengdu, Sichuan 610017, China