[1] Cent S Univ, Xiangya Hosp, Dept Anesthesiol, Changsha 410013, Hunan, Peoples R China
[2] Cent S Univ, Xiangya Sch Med, Affiliated Canc Hosp, Dept Crit Care Med, Changsha 410013, Hunan, Peoples R China
[3] Cent S Univ, Xiangya Sch Med, Affiliated Canc Hosp, Dept Hosp & Palliat Care, Changsha 410013, Hunan, Peoples R China
[4] Cent S Univ, Xiangya Sch Med, Affiliated Canc Hosp, Dept Anesthesiol, Changsha 410013, Hunan, Peoples R China
[5] Qinghai Peoples Hosp, Dept Pathol, Xining, Qinghai Provinc, Peoples R China