1. Department of Companion Animals, Atlantic Veterinary College, University of Prince Edward Island, Prince Edward Island, Canada
2. Department of Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, MA, USA
3. Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Prince Edward Island, Canada
4. Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
5. IDEXX Laboratories, Portland, ME, USA