1. Department of TCM Gynecology, Tongxiang Maternal and Child Health-Care Center, Tongxiang, Zhejiang, China
2. Department of Anesthesiology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, Zhejiang, China
3. Department of Gynecology, Zhejiang Province Hospital of TCM, Hangzhou, Zhejiang, China
4. Department of Gynecology, Tongxiang Maternal and Child Health-Care Center, Tongxiang, Zhejiang, China