1. Spine and Bone Heath Department, Bragborough Hall Health Centre, Daventry, UK
2. Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong, China
3. Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
4. Keele University, Keele, UK
5. Robert Jones and Agnes Hunt Orthopaedic and District Hospital NHS Trust, Oswestry, UK