Daniel Kendoff,MD, PhD, Surgeon in Chief, Helios Klinikum Berlin Buch, Orthopaedics and TraumaDepartment, Berlin, GermanyRhidian Morgan-Jones, MBBCh.,FRCS(Ed), M.Med.Sci., FRCS(Tr&Orth), Consultant Orthopaedic Surgeon andHonorary Lecturer, Hospital of Wales, Department of Trauma and Orthopaedics,Cardiff, Wales, UK Fares S. Haddad,BSc, MD(res), MCh, FRCS (Orth), FFSEM, Professor, University College LondonHospitals NHS Trust, Department of Trauma and Orthopaedics, London, UK