1. The Institute Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
2. Heze Municipal Hospital, Heze, Shandong, China
3. Haihe Hospital, Tianjin, China
4. The Center Hospital of Baotou, Baotou, Neimenggu, China
5. The Affiliated Hospital of Inner Mongolia Medical University, Huhehaote, Inner Mongolia, China
6. Daqing General Hospital Group Oilfield General Hospital, Daqing, Heilongjiang, China
7. The General Hospital of Shenyang Military, Shenyang, Liaoning, China
8. People's Hospital of Tianjin, Tianjin, China
9. Lanzhou University Second Hospital, Lanzhou, Gansu, China
10. The 251stHospital of PLA, Zhangjiakou, Hebei, China
11. The Second Hospital of Dalian Medical University, Dalian, Liaoning, China
12. The Second Affiliated Hospital of Harbin Medical University, HarBin, Heilongjiang, China
13. Qingdao Municipal Hospital, Qingdao, Shandong, China
14. The Center Hospital of Siping, Siping, Jilin, China
15. Wu Xi People's Hospital, Wuxi, Jiangsu, China
16. Anhui Provincial Hospital, Hefei, Anhui, China
17. Xiehe Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
18. The First Affiliated Hospital of HarBin Medical University, HarBin, Heilongjiang, China
19. Respiratory Department, The Third Xiangya Hospital, Changsha, Hunan, China
20. The Department of Health Statistics, Peking University, Beijing, China;
21. Shenyang Pharmaceutical University, Shenyang, Liaoning, China
22. The Company of Jinzhou Jiutai Pharmaceutical Co., Ltd, Jinzhou, Liaoning, China
23. Respiratory Department, The Institute Respiratory Disease, The First Hospital of China Medical University, Shenyang, China