1. Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
2. Department of Oncology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450014, P.R. China
3. Department of Pharmacology, School of Basic Medical of Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
4. Department of Obstetrics and Gynecology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China