1. Equine Department, Equine Veterinary Clinic Emmeloord, Espelerlaan 77, Emmeloord 8302 DC, the Netherlands;
2. Equine Department, DAP VUG, Evertsenlaan 18, Voorthuizen 3781 TB, the Netherlands;
3. Division of Diagnostic Imaging, Utrecht University, Yalelaan 108, Utrecht 3584 CM, the Netherlands