1. Center for Respiratory Diseases, China‐Japan Friendship Hospital Beijing China
2. Department of Pulmonary and Critical Care Medicine China‐Japan Friendship Hospital Beijing China
3. National Clinical Research Center for Respiratory Diseases Beijing China
4. Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences Beijing China
5. Beijing Key Laboratory of Emerging Infectious Diseases, Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University Beijing China