1. Department of Clinical Studies; Universidade Estadual de Londrina; Londrina Paraná Brazil
2. Department of Preventive Veterinary Medicine; Universidade Estadual de Londrina; Londrina Paraná Brazil
3. Department of Clinical Studies, Ontario Veterinary College; University of Guelph; Guelph, Ontario Canada
4. Departement of Veterinary Biomedicine, Faculté de Médecine Vétérinaire; Université de Montréal; Saint-Hyacinthe Quebec Canada