Correction to: Knee Surg Sports Traumatol Arthrosc (2011) 19 (Suppl 1):S36–S46 https://doi.org/10.1007/s00167-011-1458-4

The authors wish to declare the following competing interest, which should have been indicated in the research article.

  • The Orthokine® product used in the trial was donated by the manufacturer.

  • Co-author Carsten Moser was a medical manager and clinical director for the manufacturer of Orthokine between 2003 and 2008.