1. Department of Radiology, Faculty of Veterinary Medicine, University of Tehran, P. O. Box 14155–6453, Tehran, Iran
2. Department of Small Animal Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, P. O. Box 14155–6453, Tehran, Iran
3. Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, P. O. Box 5166616471, Tabriz, Iran