1. Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
2. Division of Gynecological Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
3. Department of Oncology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
4. Department of Gynecologic Oncology, Shandong Cancer Hospital and Institute, Jinan, China
5. Lineberger Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA