1 Shandong Provincial Center for Disease Control and Prevention, Jinan, China.
2 Department of Veterinary Medicine, College of Veterinary Medicine, Zhejiang University, Hangzhou, China.
3 Shandong Medical College, Jinan, China.
4 Linyi Center for Disease Control and Prevention, Linyi, 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.
7 The Hainan Institute of Zhejiang University, Sanya, China.