1. Department of Clinical Sciences, School of Veterinary Medicine, Hebrew University of Jerusalem, PO Box 12, Rehovot 761000, Israel
2. *Department of Pathology, Kimron Veterinary Institute, PO Box 12, Beit Dagan 50250, Israel
3. †Pathological Institute, Hasharon Hospital, Rabin Medical Center, 12 Keren Hayesod, Petach Tikva, Israel