1. Department of Oral Medicine, Academic Centre for Dentistry Amsterdam (ACTA);
2. Department of Orthopedic Surgery and Research Institute CAPHRI, Maastricht University Medical Centre, Maastricht;
3. Department of Orthopedic Surgery and Traumatology, OLVG, Amsterdam;
4. Department of Orthopaedics Greater Eindhoven, Máxima Medical Centre and Catharina Hospital, Eindhoven;
5. The Royal Dutch Dental Organisation, Nieuwegein, the Netherlands