1. Division of Gerodontology and Removable Prosthodontics University of Geneva Geneva Switzerland
2. Department of Rehabilitation and Geriatrics University Hospitals of Geneva Thônex Switzerland
3. Clinic for General, Special Care and Geriatric Dentistry Center of Dental Medicine, University of Zürich Zürich Switzerland
4. Department of Pathology and Immunology University of Geneva Geneva Switzerland
5. Department of Genetic and Laboratory Medicine Geneva University Hospitals Geneva Switzerland
6. Department of Reconstructive Dentistry and Gerodontology School of Dental Medicine, University of Bern Bern Switzerland