1. Department of Trauma and Orthopaedic Surgery, Keele University School of Medicine, North Staffordshire Hospital, Hartshill, Stoke on Trent, Staffordshire, England
2. Department of Orthopaedic Surgery, University of Aberdeen Medical School, Foresterhill, Aberdeen, Scotland
3. Department of Radiology, Aberdeen Royal Infirmary, Foresterhill, Aberdeen, Scotland