Text and Data Mining valid from 2019-06-13
Received: 28 January 2019
Accepted: 29 May 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: The Ethics Commission of the Albert-Ludwigs-University, Freiburg, Germany, approved the study (Antrag-Nr. EK-Freiburg 10006 /18).
: Not applicable.
: HL received fees for speaking from Arthrex. GB, ND-L, LL, AG, and DG declare that they have no competing interests.