1. Department of Veterinary Medicine, Institute of Preventive Veterinary Sciences, Zhejiang University College of Animal Sciences , Hangzhou, Zhejiang, China
2. Hainan Institute of Zhejiang University , Sanya, Hainan, China
3. Institute of Veterinary Immunology and Engineering, Jiangsu Academy of Agricultural Sciences , Nanjing, Jiangsu, China
4. Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine , Hangzhou, Zhejiang, China
5. State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou, Zhejiang, China