1. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD
2. Department of Pathobiology, University of Guelph, Guelph, Canada
3. IDEXX Reference Laboratories, Irvine, CA
4. Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA
5. Department of Pathobiology, Ross University School of Veterinary Medicine, Basseterre, St. Kitts, West Indies
6. IDEXX Reference Laboratories, Portland, OR