1. Oral Cancer Research Team, Cancer Research Initiatives Foundation (CARIF), Selangor, Malaysia
2. Oral and Pharyngeal Cancer Branch, National Institutes of Dental and Craniofacial Research, National Institutes of Health, Bethesda, USA
3. Department of Oro-Maxillofacial Surgical and Medical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
4. Oral Cancer Research and Coordinating Centre (OCRCC), University of Malaya, Kuala Lumpur, Malaysia
5. Department of Oral and Maxillofacial Surgery, Tengku Ampuan Rahimah Hospital, Klang, Malaysia