1. State Key Laboratory of Veterinary Etiological Biology; Key Laboratory of Veterinary Parasitology of Gansu Province; Lanzhou Veterinary Research Institute; Chinese Academy of Agricultural Sciences; Lanzhou Gansu Province P. R. China
2. Vaccines and Diagnostics, Moredun Research Institute; Pentlands Science Park; Scotland UK
3. College of Veterinary Medicine; South China Agricultural University; Guangzhou Guangdong Province P. R. China
4. College of Animal Science and Veterinary Medicine; Heilongjiang Bayi Agricultural University; Daqing Heilongjiang Province P. R. China