M. Donald McGavin, MVSc, PhD, FACVSc, Diplomate, American College of Veterinary Pathologists, Professor Emeritus of Veterinary Pathology, Department of Pathobiology, College of Veterinary Medicine, University of Tennessee, Knoxville, TN;
James F. Zachary, DVM, PhD, Diplomate, American Colllege of Veterinary Pathologists; Professor of Experimental Pathology, Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, IL