1. Department of Orthopaedics and Trauma Surgery, Flinders University and Flinders Medical Centre, Adelaide, SA 5042, Australia
2. Department of Rehabilitation, Aged and Palliative Care, College of Medicine and Public Health, Flinders University, Flinders Drive Bedford Park, SA 5042, Australia
3. Department of Epidemiology and biostatistics College of Medicine and Public Health, Flinders University, SA 5042, Australia
4. Department of Orthopaedic Surgery, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 1105 AZ, Australia Amsterdam, The Netherlands