[1] Chinese Acad Med Sci & Peking Union Med Coll, China Japan Friendship Hosp, Beijing, Peoples R China
[2] Dept Pulm & Crit Care Med, Beijing, Peoples R China
[3] China Japan Friendship Hosp, Ctr Resp Med, Dept Pulm & Crit Care Med, Beijing, Peoples R China
[4] Chinese Acad Med Sci, Inst Basic Med Sci, Dept Physiol, State Key Lab Resp Hlth & Multimorbid, Beijing, Peoples R China
[5] Peking Union Med Coll, Sch Basic Med, Beijing, Peoples R China
[6] Natl Ctr Resp Med, Beijing, Peoples R China
[7] Chinese Acad Med Sci, Inst Resp Med, Beijing, Peoples R China
[8] Natl Clin Res Ctr Resp Dis, Beijing, Peoples R China