1. The Cooperative Innovation Center for Sustainable Pig Production, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
2. State Key Laboratory of Agricultural Microbiology, Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, Hubei, China
3. Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of the People’s Republic of China, Wuhan, Hubei, China
4. International Research Center for Animal Disease, Ministry of Science and Technology of the People′s Republic of China, Wuhan, Hubei, China