[1] Huazhong Univ Sci & Technol, Tongji Hosp, Tongji Med Coll, Natl Clin Res Ctr Resp Dis,Hlth Minist,Dept Resp &, Wuhan 430030, Hubei, Peoples R China
[2] Wuhan Hosp Tradit Chinese & Western Med, Wuhan Hosp 1, Dept Resp & Crit Care Med, Wuhan 430022, Hubei, Peoples R China
[3] Univ Manitoba, Fac Med, Dept Immunol, Winnipeg, MB R3E 0W3, Canada