Gookin J L, Sellon R K, McDorman K S, Geoly F J
Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh.
J Vet Intern Med. 1998 Nov-Dec;12(6):471-4. doi: 10.1111/j.1939-1676.1998.tb02152.x.