机构:[a]Beijing Inst. of Respiratoty Med., Beijing Chaoyang Hospital, Capital University of Medical Sci., Beijing 100020, China[b]Xuanqu Hospital, Capital University of Medical Sci., Beijing 100053, China[c]Beijing Thoracic Hospital, Beijing 100095, China[d]Beijing Ditan Hospital, Beijing 100011, China[e]You'an Hospital, Capital University of Medical Sci., Beijing 100054, China[f]Peking Union Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China[g]First Hospital of Fangshan District, Beijing 102400, China[h]Changxindian Hosp. of Fangshan Dist., Beijing 100072, China[i]Department of Immunology, Capital University of Medical Sci., Beijing 100054, China