1. College of Veterinary Medicine, Yangzhou University, Yangzhou, China
2. Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
3. College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
4. Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China