Whitley Derick B, Rakestraw Peter C, Edwards John F
Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA.
J Am Vet Med Assoc. 2011 Apr 15;238(8):993-5. doi: 10.2460/javma.238.8.993.