1. Institute of Respiratory Disease; Xinqiao Hospital, Third Military Medical University; Chongqing China
2. Department of Respiratory Medicine; Southwest Hospital, Third Military Medical University; Chongqing China
3. Department of Respiratory Medicine; Children's Hospital of Chongqing Medical University; Chongqing China
4. Department of Respiratory Medicine; Daping Hospital, Third Military Medical University; Chongqing China
5. Department of Respiratory Medicine; Chongqing Three Gorges Central Hospital; Chongqing China
6. Department of Respiratory Medicine; The First Affiliated Hospital of Chongqing Medical University; Chongqing China
7. Department of Respiratory Medicine; No.324 Hospital of Chinese PLA
8. Department of Respiratory Medicine; Fuling Center Hospital of Chongqing; Chongqing China
9. Department of Respiratory Medicine; Yongchuan Hospital of Chongqing Medical University; Chongqing China
10. Department of Respiratory Medicine; The Second Affiliated Hospital of Chongqing Medical University; Chongqing China
11. Department of Respiratory Medicine; Jiangjin Central Hospital; Chongqing China
12. Department of Respiratory Medicine; Chonggang Zong Hospital; Chongqing China