Correction to: BMC Musculoskelet Disord 22, 732 (2021)

https://doi.org/10.1186/s12891-021-04612-y

Following the publication of the original article [1] the authors noticed that the statement “all authors contributed equally” appeared in the published article. This statement is directly opposite of the author contribution statement in the article. The original article [1] has been updated.