1. Faculty of Dentistry; The University of Hong Kong; Hong Kong SAR China
2. Department of Health Policy and Management; Mailman School of Public Health; Columbia University; New York NY USA
3. Department of Orofacial Sciences; School of Dentistry at University of California, San Francisco; San Francisco CA USA
4. Dental Innovation and Translation Centre; King's College London Dental Institute; London UK
5. WHO Collaborating Centre for Oral Health-General Health; and University College; London UK
6. King's College London Dental Institute; and WHO Collaborating Centre for Oral Cancer; London UK