[Wen, Gebo; Zuo, Jianhong; Luo, Zhaoyang; Wen, GB; Lv, Xiu; Li, Sai; Wen, Juan] Univ South China, Sch Med, Hengyang 421001, Hunan, Peoples R China.
[Zuo, Jianhong; Lv, Xiu; Wen, Meiling; Li, Sai] Univ South China, Nanhua Hosp, Hengyang 421000, Hunan, Peoples R China.
[Lei, Mingsheng] Zhangjiajie City Hosp, Dept Resp & Crit Care Med, Zhangjiajie 427000, Hunan, Peoples R China.