1. Beef cattle section, Newe-Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay, Israel;
2. Israeli Center for Interdisciplinary Research in Chronobiology, University of Haifa, Haifa, Israel;
3. Department of Genetics, The Hebrew University of Jerusalem, Jerusalem, Israel; and
4. Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel