[Zhou, Xiaofang; Tang, Jie; Liu, Mu] Cent South Univ, Hunan Canc Hosp, Xiangya Sch Med, Dept Gynecol Oncol,Affiliated Canc Hosp, Changsha 410013, Peoples R China.
[Sun, Lijuan] Shaoyang Cent Hosp, Dept Gynecol & Obstet, Shaoyang 422000, Peoples R China.
[Tan, Shanmei] Univ South China, Peoples Hosp Huaihua 1, Dept Gynecol & Obstet, Affiliated Huaihua Hosp, Huaihua 418000, Peoples R China.
[Liu, Tingting] First Peoples Hosp Changde, Dept Gynecol & Obstet, Changde 415000, Peoples R China.
[Xiao, Wangli] First Peoples Hosp Yueyang, Dept Gynecol & Obstet, Yueyang 414000, Peoples R China.