van Dongen A M, van Leeuwen M, Slappendel R J
Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, PO Box 80154, NL 3508 TD Utrecht, The Netherlands.
Vet Rec. 2001 Jan 20;148(3):80-2. doi: 10.1136/vr.148.3.80.