1. College of Animal Medicine, Jilin Agricultural University, Changchun 130118, P.R. China
2. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, P.R. China
3. The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun 130118, P.R. China
4. College of Basic Medical Science, Jilin University, Changchun 130012, P.R. China
5. College of Animal Science, Jilin University, Changchun 130062, P.R. China
6. College of Life Science, Jilin Agricultural University, Changchun 130118, P.R. China
7. The Engineering Research Center of Bioreactor and Drug Development, Ministry of Education, Jilin Agricultural University, Changchun 130118, P.R. China