Affiliation: | Author affiliations: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Harbin City, People’s Republic of China (T.-Q. An, Z.-J. Tian, C.-L. Leng, J.-M. Peng, G.-Z. Tong);;Shanghai Veterinary Research Institute, Shanghai, People’s Republic of China (G.-Z. Tong) |