1. South Mesa Veterinary Hospital, Fort Collins, CO, USA
2. Veterinary Dentistry and Oral Surgery of New Mexico, Santa Fe, NM, USA
3. Center for Comparative Oral and Maxillofacial Pathology, School of Veterinary Medicine, University of Wisconsin, Madison, WI, USA
4. Wisconsin Veterinary Diagnostic Laboratory, University of Wisconsin, Madison, WI, USA
5. Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, USA