1. College of Veterinary Medicine, Northeast Agricultural University Harbin China
2. Fushun Center for Animal Epidemic Disease Prevention and Control Fushun China
3. College of Animal Science and Veterinary Medicine, Southwest Minzu University Chengdu China
4. China Institute of Water Resources and Hydropower Research Beijing China
5. Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment Northeast Agricultural University Harbin China