[Luo, Min; He, Yong-Heng; Hu, Xiang-Dang; Peng, Tian-Shu; Lu, Hai-Yan] Hunan Univ Chinese Med, Dept Anorectal Dis, Affiliated Hosp 2, Changsha 410005, Hunan, Peoples R China.
[Yi, Jian; Nie, Tian; Shuai, Yun-Fei] Hunan Univ Chinese Med, Affiliated Hosp 1, Dept Blood & Oncol, Changsha 410007, Hunan, Peoples R China.
[He, Yong-Heng] Hunan Univ Chinese Med, Dept Anorectal Dis, Affiliated Hosp 2, 233 Caie North Rd, Changsha 410005, Hunan, Peoples R China.