1. Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China.
2. Department of Respiration, Qingdao Municipal Hospital, Qingdao, Shandong, China.
3. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
4. Department of Respiration, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
5. Department of Respiration, Qinghai People's Hospital, Xining, China.
6. Department of Respiratory Diseases, General Hospital of Shenyang Military Command, Shenyang, China.
7. Department of Respiration, The First Affiliated Hospital of Lanzhou University, Lanzhou, China.
8. Department of Pulmonary and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, China.
9. Department of Respiration, Tongji Hospital, Wuhan, China.
10. Department of Respiration, Xinqiao Hospital, Third Military Medical University, Chongqing, China.
11. Department of Respiration, General Hospital of Ningxia Medical University, Yinchuan, China.
12. Department of Pulmonary and Critical Care Medicine, Inner Mongolia People's Hospital, Hohhot, China.
13. Department of Respiration, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
14. Department of Respiration, Henan Provincial People's Hospital, Zhengzhou, China.
15. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
16. Department of Respiration, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
17. Department of Respiration, Xiangya Hospital, Changsha, China.
18. Department of Pulmonary and Critical Care Medicine, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China.
19. Department of Respiration, The First Affiliated Hospital of Harbin Medical University, Harbin China.
20. Department of Respiration, Guizhou Provincial People's Hospital, Guiyang, China.
21. Department of Respiration, Shanghai Central Hospital, Shanghai, China.
22. Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
23. Department of Respiration, The First Affiliated Hospital of Nanchang University, Nanchang, China.
24. Department of Respiration, Hainan General Hospital, Haikou, China.
25. Department of Respiration, Kunming General Hospital of the People's Liberation Army, Kunming, China.
26. Department of Respiration, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
27. Department of Respiration, Nanfang Hospital, Guangzhou, China.
28. Department of Respiration, Shanxi Bethune Hospital, Taiyuan, China.
29. Department of Respiration, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China.