1. Department of Clinical Science, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
2. Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
3. Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
4. Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
5. North Downs Specialist Referrals, Bletchingley RH1 4QP, United Kingdom
6. Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands