1. 1Dentistry and Oral Surgery Service, William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA
2. 2Anatomic Pathology Service, William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA
3. 3Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA