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. Clinic of General‐ Special Care‐ and Geriatric Dentistry Center of Dental Medicine University of Zurich Zürich Switzerland