1. Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China
2. Department of Respiratory Medicine, Zhongshan Hospital, Shanghai 200433, China
3. Guangzhou Medical University, Guangzhou, Guangdong 510180, China
4. AstraZeneca, Shanghai 200085, China
5. Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
6. Department of Respiratory Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
7. Department of Respiratory Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
8. Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao, Shandong 266001, China
9. Department of Respiratory Medicine, Peking University Third Hospital, Beijing 100191, China
10. Department of Respiratory Medicine, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong 510515, China
11. Department of Respiratory Medicine, General Hospital of Northern Theater Command, Shenyang, Liaoning 110016, China
12. Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China
13. Department of Respiratory Medicine, The First people's Hospital of Yunnan Province, Kunming, Yunnan 363880, China
14. Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China
15. Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Shanghai 200433, China
16. Department of Respiratory Medicine, Beijing Chao-Yang Hospital, Beijing 100020, China
17. Department of Respiratory Medicine, Shanghai General Hospital, Shanghai 200080, China
18. Department of Respiratory Medicine, Guizhou Province People's Hospital, Guiyang, Guizhou 550002, China
19. Department of Respiratory Medicine, The Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolia 010050, China
20. Department of Respiratory Medicine, The Third Affiliated Hospital of Chongqing Medical University, Chongqing 401120, China
21. Department of Respiratory Medicine, The Second Affiliated hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, China
22. Department of Respiratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
23. Department of Pulmonary and Critical Care Medicine, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
24. Department of Respiratory Medicine, The First Affiliated Hospital of PLA General Hospital, Beijing 100048, China
25. Department of Respiratory and Critical Care Medicine, The Eighth Medical Center of PLA General Hospital, Beijing 100048, China
26. Department of Respiratory, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
27. Department of Respiratory Medicine, Weifang Weien Hospital, Weifang, Shandong 261045, China
28. Department of Respiratory Medicine, Peking University First Hospital, Beijing 100034, China
29. Department of Respiratory Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
30. College of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing 100853, China
31. Department of Respiratory Medicine, China-Japan Friendship Hospital, Beijing 100029, China
32. Department of Respiratory Medicine, The First Hospital of Changsha, Changsha, Hunan 410005, China
33. Deparment of Pulmonary and Critical Care Medicine, The Sixth Medical Center of PLA General Hospital, Beijing 100048, China
34. National Heart and Lung Institute, Imperial College London, London SW3, UK
35. Royal Brompton and Harefield NHS Foundation Trust, London SW3, UK.