Ladd S M, Crisman M V, Duncan R, Rossmeisl J, Almy F S
Department of Large Animal Clinical Sciences, Virginia Maryland Regional College of Veterinary Medicine, Duckpond Drive, Phase II, Blacksburg, VA 24061, USA.
J Vet Intern Med. 2005 Nov-Dec;19(6):914-6. doi: 10.1892/0891-6640(2005)19[914:cnshia]2.0.co;2.