Maderbacher, Günther
Keshmiri, Armin
Krieg, Bernd
Greimel, Felix
Grifka, Joachim
Baier, Clemens
Article History
Received: 4 April 2018
Accepted: 13 August 2018
First Online: 21 August 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: According to the local ethical committee, no approval was necessary.
: For this type of formal consent is not required.