[Gao, Wanling; Cai, Jun; Chi, Xinjin; Guan, Jianqiang; Wei, Xiaoxia] Sun Yat Sen Univ, Affiliated Hosp 3, Dept Anesthesiol, Guangzhou 510630, Guangdong, Peoples R China.
[Yu, Xiaofan] Fujian Prov Hosp, Dept Anesthesiol, Fuzhou 350001, Fujian, Peoples R China.
[Wang, Yiheng] Univ South China, Affiliated Hosp 1, Dept Anesthesiol, Hengyang 421001, Hunan, Peoples R China.
[Li, Xi] Sun Yat Sen Univ, Affiliated Hosp 3, Dept Thyroid & Breast Surg, Guangzhou 510630, Guangdong, Peoples R China.