1. Department of Pathobiology, University of Tennessee, College of Veterinary Medicine, Knoxville, TN
2. IDEXX Laboratories, North Grafton, MA
3. Marshfield Clinic Laboratories, Veterinary Diagnostic Services, Marshfield, WI
4. Department of Comparative Medicine, University of Tennessee, College of Veterinary Medicine, Knoxville, TN
5. Experimental Pathology Laboratories, Inc., Research Triangle Park, NC