Text and Data Mining valid from 2019-11-06
Received: 24 September 2019
First Online: 6 November 2019
Compliance with ethical standards
: Rudolf Ganger, M.D. has received honoraria from Smith&Nephew, Inc. (Memphis, TN) and OrthoPediatrics Corp. (Warsaw, IN) outside of the submitted work. Sebastian Farr, M.D. has received honoraria from Orthofix SRL (Verona, IT) outside of the submitted work. All other authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (Vinzenzgruppe) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.