1. Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern Bern Switzerland
2. Division of Gerodontology and Removable Prosthodontics University Clinics of Dental Medicine, University of Geneva Geneva Switzerland
3. Department of Dentistry State University of Maringá Maringá Brazil
4. Oral Rehabilitation Center Bangalore Karnataka India
5. University of Sydney Sydney New South Wales Australia
6. Department of Periodontics and Prosthodontics Eastman Dental Hospital, University Policlinic "La Sapienza" Rome Italy
7. Clinic of General, Special Care, and Geriatric Dentistry, Center of Dental Medicine University of Zurich Zurich Switzerland
8. Chulalongkorn University Bangkok Thailand
9. Kornberg School of Dentistry at Temple University Philadelphia Pennsylvania USA
10. Centre for Public Health Queen's University Belfast Belfast UK
11. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry Chulalongkorn University Bangkok Thailand
12. Department of Dental Medicine Karolinska Institute Stockholm Sweden
13. Department of Prosthodontics Tufts University School of Dental Medicine Boston Massachusetts USA
14. Department of Periodontology Nova Southeastern University Davie Florida USA
15. Private Practice London UK