Hampshire Victoria A, Doddy Frederick M, Post Lynn O, Koogler Teresa L, Burgess Tina M, Batten Priscilla O, Hudson Roderick, McAdams Dorothy R, Brown Margarita A
United States Food and Drug Administration, Center for Veterinary Medicine, Rockville, MD 20885, USA.
J Am Vet Med Assoc. 2004 Aug 15;225(4):533-6. doi: 10.2460/javma.2004.225.533.