1. Department of Pharmacy; Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia
2. Department of Chemistry; Faculty of Science; University of Malaya; Kuala Lumpur Malaysia
3. Department of Oral Biology and Craniofacial Sciences and Oral Cancer Research and Coordinating Centre; Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
4. Department of Pharmacology; Yong Loo Lin School of Medicine; National University of Singapore; Singapore Singapore
5. Penang Medical College; George Town Pulau Pinang Malaysia