Arroyo Luis G, Quesada Rolando J, Medina-Torres Carlos E, Baird John D
Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada.
J Am Vet Med Assoc. 2011 Aug 15;239(4):435-6. doi: 10.2460/javma.239.4.435.