[Zhang, Shaoze; Li, Cheng; Li, Guang; Zhu, Liming; Dai, Aiguo; Meng, Fang; Li, San; Zhu, Hao] Hunan Normal Univ, Affiliated Hosp 1, Hunan Prov Peoples Hosp, Dept Resp & Crit Care Med, Changsha 410016, Hunan, Peoples R China.
[Dai, Aiguo; Zha, Jun] Hunan Univ Chinese Med, Med Sch, Dept Resp Dis, Changsha 410208, Hunan, Peoples R China.
[Wu, Shangjie] Cent South Univ, Xiangya Hosp 2, Dept Resp & Crit Care Med, Changsha 410011, Hunan, Peoples R China.