1. Department of Comparative Medicine, and American BioResearch, PO Box 584, Seymour, Tennessee 37865-0584
2. Department of Pathology, College of Veterinary Medicine, University of Tennessee, PO Box 1071, Knoxville, Tennessee 37901-1071
3. American BioResearch, PO Box 584, Seymour, Tennessee 37865-0584