1. Department of Gynecological Oncology, Affiliated Cancer Hospital of Zhengzhou University, Henan, P.R. China
2. Department of Cerebrovascular Disease, Henan Provincial People’s Hospital, Henan, P.R. China
3. Department of Pathology, Affiliated Cancer Hospital of Zhengzhou University, Henan, P.R. China
4. Department of Gynecology, The Second Affiliated Hospital of Zhengzhou University, Henan, P.R. China