1. Department of Orthopaedic and Trauma Surgery, St James’s University Hospital, Beckett Street, Leeds LS9 7TF, UK.
2. Division Chief of Traumatology, Department of Orthopaedic Surgery, Pittsburgh General Hospital, Suite 911, Kaufmann Med. Building, 3471 Fifth Avenue, Pittsburgh, Pennsylvania, 15213, USA.
3. Department of Orthopaedic Surgery, University of Louisville School of Medicine, ACB, Third Floor Bridge, HSC 234, Louisville, Kentucky, 40292, USA.