1. Department of Infectious Disease, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
2. Department of General Surgery, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
3. Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan 430000, China
4. Department of Respiratory, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China