1. Radiation Drug Research Department National Center for Radiation Research and Technology (NCRRT) , Egyptian Atomic Energy Authority (EAEA) , Cairo , Egypt
2. Department of Pharmacology , College of Veterinary Medicine , Cairo University , Gizah , Egypt
3. Department of Physiology, Biochemistry and Pharmacology , College of Veterinary Medicine , King Faisal University Alhasa , Kingdom of Saudi Arabia