1. Department of Gynaecology and Obstetrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
2. Department of Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
3. Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou Henan, China