Cramer Sarah D, Njaa Brad L, Genova Suzanne G, Gilliam John N
Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078, USA.
J Am Vet Med Assoc. 2011 Jun 15;238(12):1565-7. doi: 10.2460/javma.238.12.1565.