1. Department of Respiratory and Critical Care Medicine, Peking University Third Hospital, Beijing, China
2. Research Center for Chronic Airway Diseases, Peking University Health Science Center, Beijing, China
3. Department of Immunology, School of Basic Medical Sciences, NHC Key Laboratory of Medical Immunology (Peking University), Peking University, Beijing, China
4. Department of Respiratory and Critical Care Medicine, Beijing Tongren Hospital, Beijing, China
5. Peking University People’s Hospital, Beijing, China
6. Department of Pulmonary and Critical Care Medicine, Beijing Luhe Hospital, Beijing, China
7. Peking University of Shougang Hospital, Beijing, China
8. Beijing Jingmei Group General Hospital, Beijing, China
9. Peking University International Hospital, Beijing, China
10. Department of Pulmonary and Critical Care Medicine, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
11. Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China