1. Department of PharmaceuticsCollege of PharmacyKing Saud University, P.O. Box 2457 Riyadh 11451 Saudi Arabia
2. Central LaboratoryCollege of PharmacyKing Saud University, P.O. Box 2457 Riyadh 11451 Saudi Arabia
3. Department of Pharmacology and ToxicologyCollege of PharmacyKing Saud University, P.O. Box 2457 Riyadh 11451 Saudi Arabia