1. Department of Medical Genetics and Cell Biology, Ningxia Medical University, Yinchuan, Ningxia, 750004, P. R. China.
2. Key Laboratory of Reproduction and Genetics of Ningxia Hui Antonomous Region, Yinchuan, Ningxia, 750004, P. R. China.
3. Department of Reproduction, Center of Gynaecology and Obstetrics, Affiliated Hospital of Ningxia Medical University, Yinchuan, Ningxia, 750004, P. R. China.
4. Department of Surgical Oncology, Affiliated Hospital of Ningxia Medical University, Yinchuan, Ningxia, 750004, P. R. China.
5. Centre for Biophotonics, Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK.