1. Koret School of Veterinary Medicine; The Hebrew University of Jerusalem; PO Box 12 Rehovot 76100 Israel
2. Veterinary Services; Bet Dagan 50250 Israel
3. Herd Health Division; Bet Dagan 50250 Israel
4. Kimron Veterinary Institute; Bet Dagan 50250 Israel
5. ‘Hachaklait’ Caesarea; Bet Dagan 38900 Israel