1. Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
2. Department of Respiratory and Critical Care Medicine, The First People’s Hospital of Zunyi City, Zunyi City, Guizhou Province, China
3. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
4. Department of Respiratory and Critical Care Medicine, The People’s Hospital of the Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
5. Department of Respiratory Medicine, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
6. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
7. Department of Pulmonary and Critical Care Medicine Ward 1, Cangzhou Central Hospital, Cangzhou, Hebei, China
8. Department of Respiratory and Critical Care Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China
9. Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China
10. Department of Respiratory and Critical Care Medicine, Guangxi Yulin First People’s Hospital, Yulin, Guangxi, China
11. Department of Respiratory Medicine, Central Hospital in Zhungeer Banner, Muqi Road, Zhungeer Banner, Erdos, Inner Mongolia, China
12. Department of Respiratory Medicine, People’s Hospital of Nanpi County, Nanpi, Hebei, China
13. Department of Respiratory and Critical Care Medicine, Binzhou People’s Hospital, Binzhou, Shandong, China
14. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Baotou Medical College, Baotou, Inner Mongolia, China
15. Department of Respiratory and Critical Care Medicine, Changzhi People’s Hospital of Shanxi, Changzhi, Shanxi, China
16. Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, Shanghai, China
17. Department of Respiratory Medicine, Xi’an Central Hospital Affiliated to Medical College of Xi’an JiaoTong University, Xian, Shanxi, China
18. Department of Respiratory Medicine, Jinhua Central Hospital of Zhejiang, Jinhua, Zhejiang, China
19. Department of Respiratory Medicine, Linyi People’s Hospital, Linyi, Shandong, China
20. Department of Respiratory Medicine, Kunming General Hospital of Chengdu Military Command, Kunming, Yunnan, China All authors contributed equally to this paper.