1. Department of Spinal Surgery, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia
2. Adelaide Centre for Spinal Research, SA Pathology, Adelaide, Australia
3. Department of Orthopaedics, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia
4. Department of Orthopaedics, Spinal Unit, Sahlgrenska University Hospital, Gothenburg, Sweden
5. Department of Orthopaedics, Bendigo Hospital, Victoria, Australia
6. Department of Radiology, The Alfred Health, Victoria, Australia
7. Department of Radiology, Northern Health, Victoria, Australia