Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Infectious Diseases, Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Critical Care Medicine, Wuhan Red Cross Hospital - Department of Cardiology, Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Respiratory & Critical Care Medicine, Sichuan University - Department of Respiratory & Critical Care Medicine, Guangyuan Central Hospital - Department of Respiratory and Critical Care Medicine, Fourth People’s Hospital of Sichuan Province - Department of Respiratory and Critical Care Medicine, Wuhan Xiehe Hospital - Department of Neurology, Sichuan University - Department of Respiratory & Critical Care Medicine and Sichuan University - Department of Respiratory & Critical Care Medicine