[Li, Li; Tong, Wenjuan; Yang, Chunfen; Lan, Hui; Yang, Shuangjian; Liao, Wenyan; Li, Yi] Univ South China, Affiliated Hosp 1, Hengyang Med Sch, Dept Obstet & Gynecol, 69 Chuanshan Rd, Hengyang 421001, Hunan, Peoples R China.
[Li, Yi] Univ South China, Hosp Management Inst, Hengyang 421001, Hunan, Peoples R China.
[Li, Yi] Guangxi Med Univ, Affiliated Hosp 1, Dept Obstet & Gynecol, 6 Shuangyong Rd, Nanning 530021, Guangxi, Peoples R China.
[Yang, Dong] Univ South China, Affiliated Hosp 1, Hengyang Med Sch, Dept Oncol, 69 Chuanshan Rd, Hengyang 421001, Hunan, Peoples R China.
[Yang, Dong] Guangxi Med Univ, Affiliated Hosp 1, Dept Radiat Oncol, 6 Shuangyong Rd, Nanning 530021, Guangxi, Peoples R China.