1. Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
2. College of Animal Sciences, Zhejiang University, Hangzhou, China
3. Virginia Bioinformatics Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
4. Hangzhou Beta Veterinary Diagnostic Laboratory, Hangzhou, China
5. Swine Veterinary Center, P.A., St. Peter, Minnesota, USA
6. Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
7. The Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom