Larson Robert L, Tyler Jeff W, Schultz Loren G, Tessman Ronald K, Hostetler Douglas E
Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.
J Am Vet Med Assoc. 2004 Jan 1;224(1):42-8. doi: 10.2460/javma.2004.224.42.