Weisse Chick W, Berent Allyson C, Todd Kimberly L, Solomon Jeffrey A
Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
J Am Vet Med Assoc. 2008 Nov 15;233(10):1564-74. doi: 10.2460/javma.233.10.1564.