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