1. Department of Equine Sciences; Faculty of Veterinary Medicine, Utrecht University; Utrecht The Netherlands
2. Department of Pathobiology; Faculty of Veterinary Medicine, Utrecht University; Utrecht The Netherlands
3. Dermatology Department; Clinic for Small Animal Internal Medicine; Vetsuisse Faculty; University of Zurich; Zurich Switzerland
4. Department of Surgery and Anaesthesiology of Domestic Animals; Faculty of Veterinary Medicine, Ghent University; Merelbeke Belgium