1. Department of Reconstructive Dentistry and Gerodontology; School of Dental Medicine; University of Bern; Bern Switzerland
2. Department of Prosthodontics, Gerostomatology and Biomaterials; Center for Oral Health; University Medicine Greifswald; Greifswald Germany
3. Gerontechnology & Rehabilitation Group; University of Bern; Bern Switzerland
4. ARTORG Center for Biomedical Engineering Research; University of Bern; Bern Switzerland
5. Division of Gerodontology and Removable Prosthodontics; University Clinics of Dental Medicine; University of Geneva; Geneva Switzerland