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.

RCT Entities:   Population Interventions Outcomes

Correction to: Trials

https://doi.org/10.1186/s13063-019-3709-5

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.

The order of the authors has also been corrected.

Initially published authorship:

A. Hamish R. W. Simpson1*, Anna Bell-Higgs2†, Philip G. Conaghan3†, Peter Craig4†, David F. Hamilton1†, Catherine Hankey4†, Catriona Keerie5, Sarah R. Kingsbury3†, Elaine Kinsella5, Anthony R. Leeds6†, John Norrie5†, Hemant G. Pandit3†, Hazel M. Ross2†, Sharon Anne Simpson4† and Chris Tuck5†.