1. Comprehensive Dental Care Unit The Nippon Dental University Niigata Hospital Niigata Japan
2. Department of Reconstructive Dentistry and Gerodontology School of Dental Medicine University of Bern Bern Switzerland
3. Clinical Nutrition Geneva University Hospitals Geneva Switzerland
4. Department of Advanced Prosthodontics Hiroshima University Graduate School of Biomedical and Health Sciences Hiroshima Japan
5. Department of Prevention and Oral Rehabilitation School of Dentistry Federal University of Goias Goiania Brazil
6. Division of Gerodontology and Removable Prosthodontics University Clinics of Dental Medicine University of Geneva Geneva Switzerland