[Qiao, Zong-Hui; Xu, Jia] Hunan Univ Tradit Chinese Med, Dept Gynaecol & Obstet, Affiliated Hosp 1, Changsha 410007, Peoples R China.
[Tan, Ya-Li; Lei, Lei] Hunan Univ Chinese Med, Coll Integrated Tradit Chinese & Western Med, Changsha 410208, Peoples R China.
[Liu, Qi-Ying] Changsha Maternal & Child Hlth Hosp, Dept Gynaecol & Obstet, Changsha 410000, Peoples R China.
[Huang, Zi-Chun] Hunan Univ Tradit Chinese Med, Affiliated Hosp 2, Dept Gynaecol, Changsha 410005, Peoples R China.
[Hu, Zhi-Qiang; Li, Tai] Hunan Univ Chinese Med, Sch Clin Med, Changsha 410208, Peoples R China.