1. Dutch Arthroplasty Register (Landelijke Registratie Orthopedische Implantaten), ’s-Hertogenbosch;
2. Department of Orthopaedic Surgery, Sint Maartenskliniek, Nijmegen;
3. Department of Orthopaedic Surgery, Joint Research, OLVG Amsterdam;
4. Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands