[Xia, Hua; Cai, Jun; Chi, Xinjin; Wang, Yiheng] Sun Yat Sen Univ, Affiliated Hosp 3, Dept Anesthesiol, Guangzhou 510630, Guangdong, Peoples R China.
[Wang, Yiheng] Univ South China, Affiliated Hosp 1, Dept Anesthesiol, Hengyang 421000, Hunan, Peoples R China.
[Xia, Hua] Luzhou Med Sch, Affiliated Hosp, Dept Anesthesiol, Luzhou 646000, Sichuan Provinc, Peoples R China.
[Yu, Xiaofang] Fujian Prov Hosp, Dept Anesthesiol, Fuzhou 350000, Fujian Province, Peoples R China.
[Lu, Tingting] Sun Yat Sen Univ, Affiliated Hosp 3, Dept Neurol, Guangzhou 510630, Guangdong, Peoples R China.