1 Department of Pulmonary and Critical Care Medicine, Capital Medical University, Beijing, China; Department of Pulmonary and Critical Care Medicine, National Centre for Respiratory Medicine, Centre of Respiratory Medicine, National Clinical Research Centre for Respiratory Diseases, China-Japan Friendship Hospital, Beijing 100029, China.
2 Department of Pulmonary and Critical Care Medicine, National Centre for Respiratory Medicine, Centre of Respiratory Medicine, National Clinical Research Centre for Respiratory Diseases, China-Japan Friendship Hospital, Beijing 100029, China; Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China.
3 Department of Pulmonary and Critical Care Medicine, National Centre for Respiratory Medicine, Centre of Respiratory Medicine, National Clinical Research Centre for Respiratory Diseases, China-Japan Friendship Hospital, Beijing 100029, China; Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China; Institute of Respiratory Medicine, Chinese Academy of Medical Science, Beijing, China; Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing, China. Electronic address: caobin_ben@163.com.