Institution: | 1. Division of Animal Infectious Diseases, State key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, P. R. China.; 2. State key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China.; 3. Merial SAS, Lyon, France.; Cornell University, United States of America, |