1. College of Veterinary Medicine Northwest A&F University, Shaanxi Centre of Stem Cells Engineering & Technology Yangling Shaanxi China
2. Life Science Research Center Yulin University Yulin Shaanxi China
3. College of Agriculture Guangdong Ocean University Zhanjiang China
4. College of Life Science Northwest A&F University Yangling Shaanxi China
5. Key Laboratory for Mammalian Reproductive Biology and Biotechnology, Ministry of Education Inner Mongolia University Hohhot China