1. Oral Health Program, Ministry of Health, Federal Government Administrative Centre, Putrajaya 62590, Malaysia
2. Department of Community Oral Health and Clinical Prevention, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
3. Oral Cancer Research & Coordinating Centre, University of Malaya, Kuala Lumpur 50603, Malaysia
4. Department of Oral & Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
5. Department of Oral and Maxillofacial Surgery, Sarawak General Hospital, Kuching 93586, Malaysia
6. Department of Oral and Maxillofacial Surgery, Kuala Lumpur Hospital, Kuala Lumpur 50586, Malaysia
7. Department of Oral and Maxillofacial Surgery, National Cancer Institute, Putrajaya 62250, Malaysia
8. Department of Oral and Maxillofacial Surgery, Seberang Jaya Hospital, Perai 13700, Malaysia