1. Department of Small Animal Clinical Sciences (Thieman, Krahwinkel, Sims), College of Veterinary Medicine, The University of Tennessee, 2407 River Drive, Knoxville, Tennessee 37996; and the
2. Comparative Neuromuscular Laboratory (Shelton), the Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093
3. From the