1. Discipline of Endodontics, Restorative Dentistry and Prosthodontics, Discipline of Primary Dental Care & Population Health, Faculty of Dentistry, National University of Singapore, Singapore
2. Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
3. General Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
4. Clinic of General-, Special care and Geriatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
5. Centre for Public Health, Institute for Health Sciences, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, Northern Ireland