1. Department of Clinical Sciences, Faculté de Médecine Vétérinaire; Université de Montréal; 3200 Rue Sicotte Saint-Hyacinthe QC J2S 2M2 Canada
2. San Marco Veterinary Clinic, Diagnostic Imaging and Interventional Radiology; Via Sorio 114/c; Padua 35141 Italy
3. College of Veterinary Medicine; North Carolina State University; Raleigh NC 27695