1. Division of Gerodontology and Removable Prosthodontics University of Geneva Geneva Switzerland
2. Department of Removable Prosthodontics and Gerodontology Tokyo Dental College Tokyo Japan
3. Department of Geriatric Dentistry, School of Dentistry Showa University Tokyo Japan
4. Division of Fixed Prosthodontics, School of Dentistry Meikai University Saitama Japan
5. Department of Rehabilitation and Geriatrics Geneva University Hospitals Geneva Switzerland
6. Clinical Nutrition Geneva University Hospitals Geneva Switzerland