1. Department of Pulmonary and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, China-Japan Friendship Hospital, Beijing, China.
2. Department of Pulmonary and Critical Care Medicine, Qingdao Municipal Hospital, Qingdao, China.
3. Department of Respiratory Medicine, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
4. Department of Respiratory Medicine, Qinghai Provincial People's Hospital, Xi'ning, China.
5. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
6. Department of Respiratory Medicine, General Hospital of Northern Theater Command, Shenyang, China.
7. Department of Respiratory Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
8. Department of Pulmonary and Critical Care Medicine, Xinjiang Uiger Municipal People's Hospital, Urumqi, China.
9. Department of Pulmonary and Critical Care Medicine, Shanxi Bethune Hospital, Shanxi, China.
10. Department of Pulmonary and Critical Care Medicine, Inner Mongolia People's Hospital, Hohhot, China.
11. Department of Respiratory Medicine, Daqing Oilfield General Hospital, Daqing, China.
12. Department of Pulmonary and Critical Care Medicine, Shandong Provincial Hospital, Jinan, China.
13. Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Guangxi, China.
14. Department of Respiratory Medicine, Xinqiao Hospital of Army Medical University, Chongqing, China.
15. Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
16. Department of Geriatric Respiration, The First Hospital of Lanzhou University, Lanzhou, China.
17. Department of Respiration, Zhongshan Hospital Fudan University, Shanghai, China.
18. Department of Respiratory Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, China.
19. Department of Respiratory Medicine, Henan Provincial People's Hospital, Zhengzhou, China.
20. Department of Respiratory Medicine, The First Affiliated Hospital of Fujian Medical University, Xiamen, China.
21. Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, China.
22. Department of Respiratory Medicine, The First Affiliated Hospital, College of Medicine, Zhejiang University, The First Hospital of Zhejiang Province, Hangzhou, China.
23. Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China.
24. Department of Pulmonary and Critical Care Medicine, Xiangya Hospital Central South University, Changsha, China.
25. Department of Respiratory Medicine, Tianjin First Central Hospital, Tianjin, China.
26. Department of Pulmonary and Critical Care Medicine, General Hospital of Ningxia Medical University, Ningxia, China.
27. Department of Pulmonary and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China.
28. Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern University of Science and Technology, Guangzhou, China.
29. Department of Pulmonary and Critical Care Medicine, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, Shenzhen, China.
30. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
31. Department of Pulmonary and Critical Care Medicine, Hainan General Hospital, Hainan, China.
32. Department of Respiratory Medicine, Tongji Hospital, Tongji Medical college Huazhong University of Science and Technology, Wuhan, China.