Zimmermann, Felix
Liebensteiner, Michael C.
Balcarek, Peter
Article History
Received: 25 May 2018
Accepted: 2 October 2018
First Online: 6 October 2018
Compliance with ethical standards
:
: Felix Zimmermann, Michael C Liebensteiner and Peter Balcarek declare that they have no conflict of interest.
: This study was approved by the ethics committee of the medical council Baden-Württemberg, Germany (F-2018-004).