1. Department of Trauma and Orthopaedic Surgery, Conquest Hospital, The Ridge, Hastings TN37 7RD, UK
2. Department of Trauma and Orthopaedic Surgery, Tunbridge Wells Hospital, Pembury, Tunbridge Wells TN2 4QJ, UK
3. Department of Trauma and Orthopaedic Surgery, Kent and Sussex Hospital, Tunbridge Wells, UK