Correction to: Osteoarthritis Preoperative Package for care of Orthotics, Rehabilitation, Topical and oral agent Usage and Nutrition to Improve ouTcomes at a Year (OPPORTUNITY); a feasibility study protocol for a randomised controlled trial
1 Department of Trauma and Orthopaedics, University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK. hamish.simpson@ed.ac.uk.
2 Department of Trauma and Orthopaedics, University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK.
3 Edinburgh Clinical Trials Unit, University of Edinburgh, Usher Institute, Level 2, Nine Edinburgh BioQuarter, 9 Little France Road, Edinburgh, EH16 4UX, UK.
4 Leeds Institute of Rheumatic and Musculoskeletal Medicine and NIHR Leeds Biomedical Research Centre, University of Leeds, 2nd Floor, Chapel Allerton Hospital, Chapeltown Road, Leeds, LS7 4SA, UK.
5 MRC/CSO Social and Public Health Sciences Unit, University of Glasgow, 200 Renfield Street, Glasgow, G2 3QB, UK.
6 Counterweight Ltd, 85 Great Portland Street, First Floor, London, W1W 7LT, UK.
7 The Parker (arthritis) Institute, Copenhagen University Hospital, Bispebjerg og Frederiksberg, Nordre Fasanvej 57, DK-2000, Frederiksberg, Denmark.
After publication of our article [1] we have been notified that two of the author names have been mistakenly removed from the authorship list: Colin R. Howie and Nicholas D. Clement.