Xie Yaa* Wang Qiana Li Huiqinga Wen Haixiaoa Zhang Weiweia Bai Jinga Cai Leia Yang Jianpingb Yan Shupingb Mo Jiayaa Wang Donga Guo Ruixiaa#
aDepartment ofObstetrics and Gynecology,The First Affiliated Hospital of Zhengzhou University, Zhengzhou 45oo52, China
bDepartment of Pathology,The First Affiliated Hospital of Zhengzhou University, Zhengzhou 45oo52, China