1. Department of Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK
2. Animal and Veterinary Sciences, Scottish Rural Colleges, West Mains Road, Edinburgh EH9 3JG, UK
3. Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK
4. Vets Now, Penguin House, Castle Riggs, Dunfermline KY11 8SG, UK