1. ‘Hachaklait’, Gedera and The Koret School of Veterinary Medicine, the Hebrew University of Jerusalem, Bet Dagan 50250, Israel
2. *The Kimron Veterinary Institute, Bet Dagan 50250, and The Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Bet Dagan 50250, Israel
3. †‘Hachaklait’ Afula and the Regional Milk Laboratory, Afula, Israel