1. China Animal Health and Epidemiology Center Qingdao Shandong China
2. College of Veterinary Medicine Nanjing Agricultural University Nanjing Jiangsu China
3. Chengdu Hongcheng Animal Hospital Sichuan China
4. Qingdao Municipal Center for Disease Control and Prevention Qingdao Shandong China
5. Department of Veterinary Medicine College of Agriculture Yanbian University Yanji China