[Xu, Jianqiang; Pan, Yanjun; Chen, Qingyong; Zeng, Gaofeng; Wu, Jianfeng] Univ South China, Affiliated Hosp 2, Dept Cardiovasc Med, 35 Jiefang Rd, Hengyang 421001, Hunan, Peoples R China.
[Wang, Yan] Univ South China, Affiliated Hosp 2, Dept Anesthesiol, Hengyang, Hunan, Peoples R China.
[Zhao, Guojun] Guilin Med Univ, Dept Histol & Embryol, 1 Zhiyuan Rd, Guilin 541100, Guangxi, Peoples R China.