1. Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention Shandong Agricultural University Tai'an China
2. Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention Shandong Agricultural University Tai'an China
3. Pingyin Animal Husbandry and Veterinary bureau Jinan China
4. Weifang customs of the People's Republic of China Weifang China