1. Department of Obstetrics and Gynecology, The Yancheng Clinical College of Xuzhou Medical University, the First People’s Hospital of Yancheng, Yancheng, China
2. Department of Gastroenterology, The Yancheng Clinical College of Xuzhou Medical University, the First People’s Hospital of Yancheng , Yancheng, China
3. Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang City, China
4. Department of Obstetrics and Gynecology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang City, China