1. Department of Orthopaedic Surgery, University of Pretoria, Steve Biko Academic Hospital, Pretoria, South Africa
2. Walk-a-Mile Centre for Advanced Orthopaedics, Netcare Unitas Hospital, Mediclinic Midstream Hospital, Pretoria, South Africa
3. Department of Orthopaedic Surgery, Royal Brisbane Hospital, Brisbane, Australia
4. Queensland University of Technology, Brisbane, Australia
5. University of Queensland School of Medicine, Brisbane, Australia
6. Orthopaedic Research Centre of Australia, Brisbane, Queensland, Australia
7. Medical School, University of Queensland, Queensland, Australia
8. School of Medicine, University of Pretoria, Pretoria, South Africa