Funding for this research was provided by:
Smith and Nephew Orthopaedics
Received: 20 August 2018
Accepted: 27 December 2018
First Online: 9 January 2019
Ethics approval and consent to participate
: The present study was retrospectively registered with the number 2016433 by the commission for ethics at the Ärztekammer Nordrhein on 17.01.2017. All participating patients gave written consent for participation.
: All participating patients gave written consent for participation and the publication of their data. All data were saved and acquired anonymously.
: All authors declare that they have no competing interests.
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