1 Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China.
2 Department of Respiratory and Critical Care Medicine, Peking University International Hospital, Beijing 102206, China.
3 Department of Respiratory Medicine, Fujian Provincial Hospital, Fuzhou 350001, China.
4 Department of Respiratory Medicine, Beijing Aerospace General Hospital, Beijing 100076, China.
5 Department of Respiratory Medicine, 263 Hospital of the Chinese People's Liberation Army, Beijing 101149, China.
6 Department of Respiratory Medicine, The First Hospital of Tsinghua University, Beijing 100016, China.
7 Department of Respiratory Medicine, Beijing Changping Hospital, Beijing 102200, China.
8 Department of Respiratory Medicine, Beijing Mentougou District Hospital, Beijing 102300, China.
9 Department of Respiratory Medicine, The Affiliated Hospital of Guiyang Medical College, Guiyang 550004, China.
10 Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan 430060, China.
11 Department of Respiratory Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China.
12 MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) & Peking Union Medical College, Beijing 100730, China.
13 Beijing Center for Disease Prevention and Control, Beijing 100013, China.