1. Drug Bioavailability Laboratory, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
2. National Organization for Drug Control and Research, P.O. Box 29 Cairo, Egypt
3. Pharmacology and Toxicology Department, Faculty of Pharmacy (Girls), Al Azhar University, Cairo, Egypt
4. Pharmacognosy Department, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia