1. School of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia, Australia;
2. Spinal Research Group, Centre for Orthopaedic & Trauma Research, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia;
3. School of Engineering, The University of Guelph, Guelph, Ontario, Canada;
4. Affiliate Professor, The University of Adelaide, Adelaide, South Australia, Australia;
5. Spinal Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia;
6. Spinal Services, Royal Adelaide Hospital, Adelaide, South Australia, Australia;
7. Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia;
8. Research Fellow, South Australian Health and Medical Research Institute, Spinal Unit Administration, Royal Adelaide Hospital, Adelaide, South Australia, Australia;
9. School of Human Kinetics, The University of Ottawa, Ottawa, Ontario, Canada;
10. Centre for Orthopaedic & Trauma Research, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia;
11. School of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia, Australia