1. Xuanwu Hospital of Capital Medical University, Beijing
2. Department of Pulmonary and Critical Care Medicine, Center for Respiratory Diseases, China-Japan Friendship Hospital, National Clinical Research Center for Respiratory Diseases, Beijing
3. Department of Respiratory Medicine, Capital Medical University, Beijing
4. Department of Respiratory, Emergency and Critical Care Medicine, First Affiliated Hospital of Soochow University, China
5. Intensive Care Unit, Wuxi People’s Hospital, Wuxi, China
6. Intensive Care Unit, Taizhou People’s Hospital, Taizhou, China
7. First Affiliated Hospital of Nanchang University, Nanchang, China
8. Department of Critical Care Medicine, Third Affiliated Hospital of Soochow University, First People’s Hospital of Changzhou, Changzhou, China
9. Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
10. Infectious Diseases Department, Shenzhen Third People’s Hospital, Shenzhen, China
11. Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
12. Fifth People’s Hospital of Suzhou, China
13. Intensive Care Unit, Wuhan Medical Treatment Center Hospital, Wuhan, China
14. Department of Respiratory Medicine, Second Affiliated Hospital of Anhui Medical University, China
15. Intensive Care Unit, Suzhou Municipal Hospital, Soochow, China
16. Infectious Diseases Department, Henan Provincial People’s Hospital, Zhengzhou, China
17. Center for Respiratory Diseases, Suining Central Hospital, Suining, China
18. Department of Critical Care Medicine, Zhongda Hospital, Southeast University, Nanjing, China
19. Intensive Care Unit, Affiliated Hospital of Nantong University, Nantong, China
20. Department of Pulmonary and Critical Care Medicine, Huai’an First People’s Hospital, Nanjing Medical University, Huai’an, China
21. Intensive Care Unit, Anhui No. 2 Province People’s Hospital, China
22. Intensive Care Unit, Jieyang People’s Hospital, Jieyang, China
23. Lishui Municipal Central Hospital, China
24. Intensive Care Unit, Guangzhou No. 8 People’s Hospital, Guangzhou, China
25. Yancheng First People’s Hospital, Yancheng, China
26. Intensive Care Unit, Dongguan People’s Hospital, Dongguan, China
27. Intensive Care Unit, First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, China
28. Department of Respiratory Medicine, Anqing Municipal Hospital, Anqing, China
29. Intensive Care Unit, Binhu Hospital of Hefei, China
30. Department of Pulmonary and Critical Care Medicine, Second Xiangya Hospital of Central South University, Changsha, China
31. Infectious Diseases Department, First Hospital of China Medical University, Shenyang, China
32. Department of Pulmonary and Critical Care Medicine, Fuzhou Pulmonary Hospital of Fujian, Fuzhou, China
33. Bozhou People’s Hospital, Bozhou, China
34. Department of Critical Care Medicine, Second People’s Hospital of Hefei, Hefei, China
35. Infectious Diseases Department, General Hospital of Wanbei Coal-Electric Group, Suzhou, China
36. Infectious Diseases Department, Zhaoqing First People’s Hospital, Zhaoqing, China
37. Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, China
38. Infectious Diseases Department, Putian Municipal Hospital, Putian, China
39. Intensive Care Unit, First People’s Hospital of Xiangtan City, Xiangtan, China
40. Infectious Diseases Department, Lu’an People’s Hospital, Lu’an, China
41. Yunnan Provincial Infectious Disease Hospital, Kunming, China
42. Department of Critical Care Center, Yueqing First People’s Hospital, Wenzhou Medical University, Yueqing, China
43. Department of Respiratory Medicine, Beilun District People’s Hospital, China
44. Third Affiliated Hospital of Wenzhou Medical University, Rui’an, China
45. Department of Respiratory Medicine, Huzhou Central Hospital, Huzhou, China
46. Department of Respiratory Medicine, Ningbo First Hospital, Ningbo, China
47. Department of Respiratory Medicine, Suichang County People’s Hospital, Lishui, China
48. Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing