1. Flemish-Netherlands Geriatric Oral Research Group BENECOMO; Ghent Belgium/Nijmegen The Netherlands
2. Department of Oral Function and Prosthetic Dentistry; Radboud university medical center; Nijmegen The Netherlands
3. Department of Orthopaedic Surgery; Catharina Hospital; Eindhoven The Netherlands
4. Sevagram; Heerlen The Netherlands
5. Amaris Gooizicht; Hilversum The Netherlands
6. Centre for Special Care in Dentistry; Amsterdam The Netherlands