Michel Kathryn E, Willoughby Kristina N, Abood Sarah K, Fascetti Andrea J, Fleeman Linda M, Freeman Lisa M, Laflamme Dorothy P, Bauer Cassondra, Kemp Brona L E, Doren Janine R Van
Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
J Am Vet Med Assoc. 2008 Dec 1;233(11):1699-703. doi: 10.2460/javma.233.11.1699.