Bullert, Kevin-Gerrit
Gutleben, Klaus-Jürgen
Horstkotte, Dieter
Fischbach, Thomas
Körfer, Jan
Körber, Britta
Nölker, Georg http://orcid.org/0000-0003-2789-8247
Article History
Received: 27 April 2018
Accepted: 11 October 2018
First Online: 25 October 2018
Compliance with ethical standards
: The study was approved by the ethics committee of the Ruhr-Universität Bochum, Sitz Bad Oeynhausen.
: The authors declare that they have no conflicts of interest.