1 Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital; National Clinical Research Center for Respiratory Diseases; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100029, China.
2 The Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310000, China.
3 Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100012, China.
4 Department of Respiratory Medicine, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China.