1. State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestocks, Inner Mongolia University, Hohhot, China.
2. Department of Urology, Inner Mongolia Autonomous Region People's Hospital, Hohhot, China.
3. State Key Laboratories of Reproductive Medicine, Nanjing Medical University, Nanjing, China.
4. Jiangsu Key Laboratory of Xenotransplantation, Nanjing Medical University, Nanjing, China.