1 Bone & Joint Research, London, UK; George Harrison Law Professor of Orthopaedic Surgery; Department of Orthopaedics, Royal Infirmary of Edinburgh, Edinburgh, UK.
2 School of Health and Social Care Edinburgh Napier University, Edinburgh, UK.
3 Director, Edinburgh Clinical Trials Unit, (ECTU) Co-Director, Centre for Population Health Sciences, Usher Institute, The University of Edinburgh, Edinburgh, UK.