Roth, Sebastian
Fox, Henrik
Fuchs, Uwe
Schulz, Uwe
Costard-Jäckle, Angelika
Gummert, Jan F.
Horstkotte, Dieter
Oldenburg, Olaf
Bitter, Thomas
Article History
Received: 25 August 2017
Accepted: 20 December 2017
First Online: 19 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.