1. Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS40 5DU
2. Department of Clinical Science, Koret School of Veterinary Medicine, Hebrew University of Israel, Rehovot 76100, Israel
3. Bryanston Veterinary Hospital, Bryanston 2021, South Africa
4. Faculty of Veterinary Science, The University of Sydney, Sydney, New South Wales 2003, Australia
5. Clinique Vétérinaire, 30250 Sommieres, France
6. Cytopath, Ledbury HR8 2YD, United Kingdom