Kreutzträger, Martin
Voss, Heiko
Scheel-Sailer, Anke https://orcid.org/0000-0003-3820-6664
Liebscher, Thomas https://orcid.org/0000-0002-6025-6564
Article History
Received: 12 March 2017
Revised: 4 January 2018
Accepted: 6 January 2018
First Online: 31 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.