1. School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
2. Key Laboratory of Fertility Preservation and Maintenance (Ningxia Medical University), Ministry of Education, Yinchuan 750004, China
3. School of Clinical Medicine, Ningxia Medical University, Ningxia, China
4. The General Hospital of Ningxia Medical University, Ningxia, China
5. Department of Surgical Oncology, Tumor Hospital, The General Hospital of Ningxia Medical University, Ningxia, China