Uschok, Stephan
Herrmann, Sebastian
Pauly, Stephan
Perka, Carsten
Greiner, Stefan
Article History
Received: 19 November 2017
First Online: 19 June 2018
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Stephan Uschok, Sebastian Herrmann, Stephan Pauly, Carsten Perka and Stefan Greiner declare that they have no conflict of interest.