Lipitz L, Rylander H, Forrest L J, Foy D S
Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.
J Vet Intern Med. 2010 Nov-Dec;24(6):1509-14. doi: 10.1111/j.1939-1676.2010.0581.x. Epub 2010 Aug 24.