1. Department of International and Community Oral Health Tohoku University, Graduate School of Dentistry Sendai Japan
2. Facultad de Odontología Universidad Nacional de Colombia Bogotá Colombia
3. Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry Alexandria University Alexandria Egypt
4. Research Department of Epidemiology and Public Health, WHO Collaborating Centre of Oral Health Inequalities and Public Health University College London London UK
5. National Dental Research Institute Singapore, National Dental Centre Singapore Singapore Singapore
6. Oral Health ACP, Health Services and Systems Research Programme Duke‐NUS Medical School Singapore Singapore