1. William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA
2. Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA
3. Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA
4. Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, CA