1. Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
2. Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA
3. Escuela de Medicina Veterinaria, Facultad Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
4. Clinica Veterinaria Nervianese, Nerviano, Italy