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 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. Read the full article ›