Institution: | aLaboratory of Epidemiology, Veterinary Institute, Academy of Military Medical Sciences, 1068 Qinglong Road, Changchun 130062, PR China;bCollege of Animal Science and Veterinary Medicine, Agricultural Division, Jilin University, 5333 Xi'an Road, Changchun 130062, PR China;cCollege of Life Science, Jilin Agricultural University, Changchun 130062, PR China |