Köninger, Angela http://orcid.org/0000-0003-2721-7210
Kampmeier, Antje
Mach, Pawel
Schmidt, Boerge
Strowitzki, Thomas
Kimmig, Rainer
Gellhaus, Alexandra
Article History
Received: 19 October 2017
Accepted: 9 February 2018
First Online: 16 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki Declaration and its later amendments. The study was approved by the Research Ethics Committee of the Faculty of Medicine, University Duisburg-Essen, Germany (No. 11-4643).
: Written informed consent was obtained from all individual participants included in the study.