Sykes J E, Mapes S, Lindsay L L, Samitz E, Byrne B A
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA.
J Vet Intern Med. 2010 Jul-Aug;24(4):973-6. doi: 10.1111/j.1939-1676.2010.0491.x. Epub 2010 Mar 22.