1. Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 211000, China
2. Department of Respiratory and Critical Care Medicine, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
3. Department of Pediatrics, Qingyun County People’s Hospital, Dezhou 253700, China
4. Department of Infectious Disease, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 211000, China