1 State Key Laboratory of Agricultural Microbiology, Cooperative Innovation Center for Sustainable Pig Production, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.
2 Department of Neurology, People's Hospital of Zhengzhou University, Henan People's Hospital, Zhengzhou, Henan, China.
3 Henan Centre for Animal Diseases Control and Prevention, Zhengzhou, Henan, China.