Couëtil L L, Sojka J E, Nachreiner R F
Department of Veterinary Clinical Sciences, Purdue University School of Veterinary Medicine, West Lafayette, IN 47907-1248, USA.
J Vet Intern Med. 1998 Jan-Feb;12(1):45-9. doi: 10.1111/j.1939-1676.1998.tb00496.x.