Retraction Note: J Orthop Surg Res (2020) 15:415

https://doi.org/10.1186/s13018-020-01946-6

This article [1] has been retracted at the request of the authors. Following publication of the original article, the authors found errors in the counting and reconciling the data.

The Editor-in-Chief has offered the authors the opportunity resubmit their article with the correct results.

All authors agree to this retraction.