Ludwigs, Kai http://orcid.org/0000-0003-2367-5345
Erdtmann, Stephan
Article History
Received: 30 August 2018
Accepted: 13 November 2018
First Online: 28 November 2018
Compliance with Ethical Standards
:
: We hereby confirm that no one of the authors has any conflict of interest with this publication. Additionally, we declare that this research was conducted in line with the Declaration of Helsinki which explains all main rules for human research ethics.