Affiliation: | (1) Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK;(2) Spinal Deformity Unit, Galeazzi Orthopaedic Institute, Via Galeazzi 4 , 20161 Milan, Italy;(3) Spinal Deformity Unit, Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, HA7 4LP, UK;(4) Musculoskeletal Radiology Department, Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, HA7 4LP, UK |