1. Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. Institute of Biosciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
3. Food Science and Technology Department, College of Agricultural Studies, Sudan University for Sciences and Technology, P.O. Box 71, Khartoum North, Sudan
4. Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
5. Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi arabia