1. Department of Medicine, University of California , San Diego, La Jolla, CA 92093, USA
2. Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California , San Diego, La Jolla, CA 92093, USA
3. Tumor Biology Research Program, Children’s Cancer Hospital , Cairo 57357, Egypt
4. Pharmacology Department, Faculty of Medicine, Assuit University , Assuit 71515, Egypt