1. Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
2. Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Huazhong Agricultural University, Ministry of Education, Wuhan 430070, China
3. Experimental Veterinary Medicine Education, Huazhong Agricultural University, Wuhan 430070, China
4. Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
5. The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China