Neil Kirsten M, Caron John P, Orth Michael W
Department of Large Animal Clinical Science, College of Veterinary Medicine, Michigan State University, East Lansing, Ml 48824-1314, USA.
J Am Vet Med Assoc. 2005 Apr 1;226(7):1079-88. doi: 10.2460/javma.2005.226.1079.