[Hu, Xiaoling; Liu, Yu; Wu, Junting; Yang, Fengrui; Liu, Wenjie] Univ South China, Affiliated Hosp 1, Dept Anesthesiol, Hengyang 421001, Hunan, Peoples R China.
[Liu, Yiming] Univ South China, Affiliated Nanhua Hosp, Dept Anesthesiol, Hengyang 421001, Hunan, Peoples R China.
[Chen, Ji] Univ South China, Affiliated Hosp 1, Dept Endocrinol, Hengyang 421001, Hunan, Peoples R China.
[Yang, Fengrui] Johns Hopkins Univ, Sch Med, Dept Anesthesiol & Crit Care Med, Baltimore, MD 21287 USA.