1. Clinical Nursing Department, School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
2. Department of Respiratory and Critical Care Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
3. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
4. Health Inspection and Testing Institute, Shandong Provincial Center for Disease Control and Prevention, Jinan, China
5. Blood Center of Shandong Province, Jinan, China
6. Institute of Virology, Shandong Provincial Center for Disease Control and Prevention, Jinan, China
7. Department of Respiratory, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
8. The First Affiliated Hospital of Shandong First Medical University, Shandong Institute of Respiratory Diseases, Jinan, China
9. Department of Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
10. Department of Radiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong University, Jinan, China
11. Department of Lung Disease, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
12. Department of Intensive Care Unit, Shandong Provincial Chest Hospital, Jinan, China
13. Department of Respiratory Medicine, Dezhou People’s Hospital, Dezhou, China
14. Department of Critical Care Medicine, Zibo Central Hospital, Zibo, China
15. Infectious Department, Zaozhuang Municipal Hospital, Zaozhuang, China