1. College of Food ScienceNortheast Agricultural University Harbin 150030 China
2. Key Laboratory of Dairy Science, Ministry of Education, College of Food ScienceNortheast Agricultural University Harbin 150030 China
3. AuthorSuniswithChina Institute to Veterinary Drug Control Beijing 100081 China
4. College of Veterinary MedicineNortheast Agricultural University Harbin 150030 China