1. Department of Epidemiology & Public Health, Faculty of Pop Health Sciences University College London London UK
2. School of Dentistry University of Liverpool
3. Oral and Maxillofacial Surgery department York and Scarborough Teaching Hospitals NHS Foundation Trust York UK
4. Marion Peckham Egan School of Nursing & Health Studies Fairfield University Fairfield Connecticut USA
5. Department of Special Care Dentistry Surrey and Sussex Healthcare Trust
6. Institute for Global Health, University College London London UK
7. Eastman Dental Institute, Faculty of Medical Sciences, University College London London UK