Affiliation: | 1. State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, China;2. College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, China;3. Weihai Wendeng Central Hospital, Weihai, Shandong Province, China;4. Affilliated Hospital of Medical College, Qingdao University, Qingdao, Shandong Province, China |