1. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
2. Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
3. School of Life Sciences, Zhengzhou University, Zhengzhou, China
4. Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, China