title: Surgical trial design - learning curve and surgeon volume: Determining whether inferior results are due to the procedure itself, or delivery of the procedure by the surgeon.
authors.affiliation: University of Edinburgh, Editor-in-Chief, Bone & Joint Research, 22 Buckingham Street, London WC2N 6ET, UK editorbjr@boneandjoint.org.uk.
authors.forename: A H R W
authors.initials: AH
authors.lastname: Simpson
authors.affiliation: Department of Orthopaedic Surgery, University of Edinburgh, Edinburgh, E16, 4SA, UK.
authors.forename: C R
authors.initials: CR
authors.lastname: Howie
authors.affiliation: Usher Institute of Population Health Sciences and Informatics, Nine Edinburgh BioQuater, 9 Little France Road, Edinburgh, EH16 4UX, and Director, Clinical Trials Unit, University of Edinburgh, Outpatients Building, Floor Two, Room D36, Western General Hospital, Crewe Road South, Edinburgh, EH4 2XU, UK.
authors.forename: J
authors.initials: J
authors.lastname: Norrie