1. Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
2. National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agriculture Research Center, Giza, Egypt
3. Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Minneapolis, Minnesota, USA
4. Department of Veterinary Medicine, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, Maryland, USA
5. CEFE, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France
6. Ceva Biovac, Beaucouzé, France
7. University of California, Los Angeles, California, USA
8. National Veterinary Services Laboratories, United States Department of Agriculture, Ames, Iowa, USA