Witzel, Kai https://orcid.org/0000-0003-1969-2871
Benhidjeb, Tahar
Kaminski, Cornelia
Messenbaeck, Franz G.
Weitzendorfer, Michael
Article History
Received: 24 October 2017
Accepted: 16 January 2018
First Online: 1 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ethical approval and judgement was given by the Chamber of Physicians Hesse. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.