1. Department of Veterinary and Biomedical Sciences Animal Disease Research and Diagnostic Laboratory South Dakota State University Brookings South Dakota USA
2. Department of Population Medicine and Diagnostic Sciences Animal Health Diagnostic Center College of Veterinary Medicine Cornell University Ithaca New York USA
3. Department of Diagnostic Medicine/Pathobiology College of Veterinary Medicine Kansas State University Manhattan Kansas USA
4. Pipestone Applied Research Pipestone Veterinary Services Pipestone Minnesota USA