From The British Editorial Society of Bone and Joint Surgery, London, United KingdomI. R. Murray, BMedSci(Hons), MRCS, MFSEM(UK), PhD, Clinical Lecturer, Department of Orthopaedics and TraumaS. J. Wordie, BSc(Hons), Medical Student University of Edinburgh, Old Dalkeith Road, Edinburgh, EH16 4SA, UK.A. D. Murray, MRCGP, FFSEM, FRCP(Glas), Consultant in Sport and Exercise Medicine University of Edinburgh, Old Dalkeith Road, Edinburgh, EH16 4SA, and European Tour Golf, Wentworth Drive, Virginia Water, GU25 4LX, UK.C. W. Oliver, BSc, MB BS, FRCS(Tr&Orth), FRCS(Ed&Eng), FRCP(Ed), DM, DMI RCSEd, Professor Physical Activity for Health Research Centre University of Edinburgh, St Leonard’s Land, Holyrood Road, Edinburgh, EH8 8AQ, UK.A. H. R. W. Simpson, MA(Cantab), DM (Oxon), FRCS(England & Edinburgh), George Harrison Law Professor of Orthopaedic Surgery, Royal Infirmary of Edinburgh, Editor-in-Chief Bone & Joint Research, 22 Buckingham Street, London WC2N 6ET, UK.F. S. Haddad, BSc MD (Res), FRCS (Tr&Orth), Professor of Orthopaedic Surgery, Editor-in-Chief The Bone & Joint Journal, 22 Buckingham Street, London, WC2N 6ET and NIHR University College London Hospitals Biomedical Research Centre, UK.