By K. M. Dyce, DVM & S, Bsc, MRCVS, Professor Emeritus of Veterinary Anatomy, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK; W. O. Sack, DVM, PhD, Dr. Medical Veterinary, College of Veterinary Medicine, Cornell University, Ithaca, NY; and C. J. G. Wensing, DVM, PhD, Director of the National Institute of Animal Science and Health (Lelystad), Professor of Veterinary Medicine, State University Utrecht, The Netherlands |