1. Department of Neurology, Anderson Moores Veterinary Specialist Winchester UK
2. Department of Veterinary Pathology, School of Veterinary Science, Institute of Infection, Veterinary and Ecological Sciences, Faculty of Health and Life Sciences University of Liverpool Neston UK
3. Department of Comparative Biomedicine and Food Science University of Padova Legnaro Italy
4. Department of Small Animal Clinical Science, School of Veterinary Science, Institute of Infection, Veterinary and Ecological Sciences, Faculty of Health and Life Sciences University of Liverpool Neston UK
5. Department of Pathobiology, School of Veterinary Medicine University of Pennsylvania Philadelphia Pennsylvania USA