1. Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China.
2. Department of Pulmonary and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
3. Department of Pulmonary Diseases, the First Hospital of China Medical University, Shenyang, China.
4. Department of Pulmonary Diseases, Xinqiao Hospital, Chongqing, China.
5. Department of Pulmonary Diseases, the Second Xiangya Hospital of Central South University, Changsha, China.
6. Department of Pulmonary Diseases, Zhongshan Hospital, Fudan University, Shanghai, China.
7. Department of Pulmonary Diseases, Capital Medical University Affiliated Beijing Friendship Hospital, Beijing, China.
8. Department of Pulmonary and Critical Care Medicine, Capital Medical University Affiliated Anzhen Hospital, Capital Medical University, Beijing, China.
9. Department of Pulmonary Diseases, First Affiliated Hospital of Kunming Medical University, Kunming, China.
10. Department of Pulmonary Diseases, Nanjing Chest Hospital, Nanjing, China.
11. Boehringer Ingelheim, Shanghai, China.