1. Department of Pharmacology; Faculty of Medicine; University of Malaya; 50603; Kuala Lumpur; Malaysia
2. Faculty of Medicine & Health Sciences; University of Tunku Abdul Rahman (UTAR); Bandar Sungai Long; 43000; Selangor; Malaysia
3. Department of Pharmacy; Faculty of Medicine; University of Malaya; 50603; Kuala Lumpur; Malaysia
4. Department of Biomedical Sciences; University of Illinois College of Medicine; Rockford; IL; 61107; USA
5. Department of Chemical Science; Faculty of Science; University of Tunku Abdul Rahman (UTAR); Jalan Universiti; Bandar Barat; 31900; Kampar; Perak; Malaysia