1. Department of Veterinary Clinical Sciences, College of Veterinary MedicineUniversity of Minnesota St. Paul Minnesota
2. Department of Microbiology, Immunology, and Pathology and the Flint Animal Cancer Center, College of Veterinary Medicine and Biomedical SciencesColorado State University Fort Collins Colorado
3. Department of Veterinary Biomedical SciencesUniversity of Minnesota St. Paul Minnesota