Received: 11 December 2018
Accepted: 5 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: This study was approved by the district medical ethics committee of Maxima Medisch Centrum (Eindhoven, The Netherlands) (N18.156). Written informed consent was obtained from all included patients prior to study participation.
: Not applicable.
: PP is a paid employee of ZimmerBiomet as a commercial entity which has non-financial associations that may be relevant to the submitted manuscript. The other authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.