1. Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI, USA
2. Dick White Referrals, Cambridge, UK
3. Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI, USA
4. Department of Pathology and Infectious Diseases, Royal Veterinary College, London, UK
5. Animal Medical Center, New York, NY, USA
6. Department of Anatomic Pathology, Animal Medical Center, New York, NY, USA