Xinya ZH 1, Xintong L 1, Shiyun W 1, Meili P 1, Lei W 2, Yaping L 3, Yuliang Z 1*
1 Department of Gynecology and Obstetrics, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China.
2 Department of Gynecology and Obstetrics, Xi’an Central Hospital, Xi’an, Shaanxi, China.
3 Quality control department, Xi’an Central Hospital, Xi’an, Shaanxi, China.
Yuliang Z, Department of Gynecology and Obstetrics, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China. Tel: 18991232179; Email: zouyuliangfl@126.com