1. Institute of Preventive Veterinary Sciences & Department of Veterinary Medicine, Zhejiang University College of Animal Sciences, Hangzhou, China
2. Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou, China
3. Hainan Institute of Zhejiang University, Sanya, China
4. Jiangsu Institute of Poultry Science, Yangzhou, Jiangsu, China
5. Institute for Veterinary Food Science, Justus Liebig University Giessen, Giessen, Germany
6. 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, College of Medicine, Zhejiang University, Hangzhou, China