1. Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine University of Geneva Geneva Switzerland
2. Centre for Health Economics and Medicines Evaluation (CHEME), School of Health Sciences Bangor University Bangor UK
3. Division of Gerodontology, School of Dental Medicine University of Bern Bern Switzerland
4. Clinic of General‐ Special care‐ and Geriatric Dentistry, Center of Dental Medicine University of Zürich Zürich Switzerland
5. Health Services Research Group, Centre for Public Health Queens University Belfast Belfast UK
6. Division of Gerodontology, Department of Prosthodontics Dental School of the National and Kapodistrian University of Athens Athens Greece
7. Public Health Wales Cardiff UK