1. Department of Traumatology, John Hunter Hospital, Newcastle, Australia
2. Department of Spinal Rehabilitation, Prince of Wales Hospital, Sydney, Australia
3. Department of Orthopaedic Reconstruction Center, Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan
4. Department of Orthopaedic Surgery, Nagasaki Medical Center, Nagasaki, Japan
5. Department of Traumatology, John Hunter Hospital and University of Newcastle, Newcastle, Australia