1. Department of Veterinary Medicine and Surgery (Dvorak, Mann, Henry), College of Veterinary Medicine, University of Missouri-Columbia, Columbia, Missouri 65211
2. Affiliated Veterinary Specialists, P. A. (Beaver, Bellah), 275 Corporate Way, Suite 100, Orange Park, Florida 32073; and the
3. Department of Small Animal Clinical Sciences (Ellison), College of Veterinary Medicine, University of Florida, Gainesville, Florida 32610
4. From the