1. Department of Medical Imaging; University of Liège; Faculty of Veterinary Medicine; Sart-Tilman 4000 Liège Belgium
2. Institut de Pathologie et Génétique Loverval; Allées des Templiers 41 6280 Gerpinnes Belgium
3. Department of Small Animal Surgery; University of Liège; Faculty of Veterinary Medicine; Sart-Tilman 4000 Liège Belgium
4. Départements des Sciences Cliniques; Faculté de Médecine Vétérinaire; Université de Montréal; Saint-Hyacinthe Québec J2S 7C6 Canada