1. MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety; Jiangsu Engineering Laboratory of Animal Immunology; Institute of Immunology; College of Veterinary Medicine; Nanjing Agricultural University; Tongwei Road, Xuanwu District Nanjing 210095 China
2. MRC-University of Glasgow Centre for Virus Research; 464 Bearsden Road Glasgow G61 1QH UK
3. CAS Key Laboratory of Pathogenic Microbiology and Immunology; Institute of Microbiology; Chinese Academy of Sciences; NO.1 Beichen West Road, Chaoyang District Beijing 100101 China
4. Key Laboratory of Animal Virology of Ministry of Agriculture; Zhejiang University; 866 Yuhangtang Rd Hangzhou 310058 China
5. Department of Microbiology; Queen Mary Hospital; Hong Kong 999077 China
6. National Institute for Viral Disease Control and Prevention; Chinese Center for Disease Control and Prevention (China CDC); Beijing 102206 China