1. Hospital for Small Animals, Division of Veterinary Clinical Studies, R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, United Kingdom
2. Division of Companion Animal Sciences, University of Glasgow Faculty of Veterinary Medicine, Glasgow G61 1QH, United Kingdom
3. Division of Companion Animal Studies, Department of Clinical Veterinary Science, University of Bristol, Bristol BS40 5DU, United Kingdom
4. Division of Veterinary Pathology, Infection and Immunity, Department of Clinical Veterinary Science, University of Bristol, Bristol BS40 5DU, United Kingdom
5. Langford Veterinary Diagnostics, Department of Clinical Veterinary Science, University of Bristol, Bristol BS40 5DU, United Kingdom