1. College of Pharmacy; University of Sharjah; Sharjah 27272 United Arab Emirates
2. Department of Pharmacology and Toxicology, Faculty of Pharmacy; Beni-Suef University; Beni-Suef 62511 Egypt
3. Department of Pharmacology and Toxicology, Faculty of Pharmacy; Ain Shams University; Cairo 11566 Egypt
4. Biology Department, School of Sciences and Engineering; The American University in Cairo; New Cairo Egypt