1 Department of Trauma and Orthopaedics, Royal Liverpool and Broadgreen University Hospitals, Prescot Road, Liverpool L7 8XP, UK. Electronic address: nastaran08@hotmail.co.uk.
2 Department of Trauma and Orthopaedics, Royal Liverpool and Broadgreen University Hospitals, Prescot Road, Liverpool L7 8XP, UK.
3 Mersey Regional Plastic Surgery Unit, Whiston Hospital, Warrington Road, Prescot, Merseyside L35 5DR, UK.