1. College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China.
2. General Monitoring Station for Wildlife-borne Infectious Diseases, State Forestry and Grass Administration, Shenyang, China.
3. College of Basic Medicine, Mudanjiang Medical College, Mudanjiang, China.
4. College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.