1. UPM-MAKNA Cancer Research Laboratory, Institute of Bioscience, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
2. Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
3. Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
4. Medical Research Center, Faculty of Medicine, Jazan University, Jazan, P.O. Box 114, Saudi Arabia
5. Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
6. Department of Microbiology and Pathology, Faculty of Veterinary Medicine, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia