1. 1College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, China
2. 2Inner Mongolia Key Laboratory of Basic Veterinary Science, Inner Mongolia Agricultural University, Hohhot, China
3. 3Basic Medical College, Inner Mongolia Medical University, Hohhot, China
4. 4Institute of Animal Husbandry, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
5. 5Inner Mongolia of Agricultural and Animal Husbandry Science, Hohhot, China