Butscheidt, Sebastian
Rolvien, Tim
Ritter, Jakob
Heinemann, Axel
Vogel, Hermann
Amling, Michael
Püschel, Klaus
Article History
Received: 11 December 2017
Revised: 15 February 2018
Accepted: 3 April 2018
First Online: 17 April 2018
Compliance with ethical standards
:
: Sebastian Butscheidt, Tim Rolvien, Jakob Ritter, Axel Heinemann, Hermann Vogel, Michael Amling, and Klaus Püschel declare that they have no conflict of interest.