1. Department of Pharmacology and School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel, Department of Medicinal Chemistry and Natural Products, School of Pharmacy, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel, and The Lautenberg Center for General and Tumor Immunology, The Hebrew University, Hadassah Medical School, Jerusalem 91120, Israel