1. Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
2. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
3. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
4. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
5. Dutch Arthroplasty Register, Radboud University Medical Center, Nijmegen, the Netherlands
6. Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, the Netherlands