Vite C H, Cozzi F, Rich M, Klide A K, Volk S W, Lombardo R
Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104-6010, USA.
J Vet Intern Med. 1998 Sep-Oct;12(5):394-7. doi: 10.1111/j.1939-1676.1998.tb02141.x.