1. Department of Dental Public Health, Faculty of Dentistry, MAHSA University, Selangor, Malaysia;
2. Department of Oral Pathology Oral Medicine, Faculty of Dentistry, MAHSA University, Selangor, Malaysia;
3. Division of Medical Statistics and Bioinformatics, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung, Taiwan;
4. Department of Community Oral Health and Clinical Prevention, Faculty of Dentistry, University of Malaya, Selangor, Malaysia;
5. Department of Children and Community Oral Health, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia;
6. Sarawak State Health Department, Kota Samarahan, Malaysia;
7. ICMR-National Institute of Cancer Prevention and Research, WHO-FCTC Global Knowledge Hub on Smokeless Tobacco, Noida, National Capital Region, India;
8. Head and Neck Cancer Team, Cancer Research Malaysia, Subang Jaya, Malaysia;
9. Faculty of Dentistry, University of Malaya, Wilayah Persekutuan, Kuala Lumpur, Malaysia;
10. Faculty of Dentistry, University of Airlangga, Suarabaya, East Java, Indonesia