1. Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, Canada
2. YagerBest Histological and Cytological Services, Guelph, Ontario, Canada
3. Population Medicine, Ontario Veterinary College, University of Guelph, Ontario, Canada
4. Biomedical Sciences, Ontario Veterinary College, University of Guelph, Ontario, Canada
5. Department of Veterinary Clinics, Veterinary Medical School, UNESP, Sao Paulo State University, Botucatu, Brazil
6. Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan