Weber, Frank
Shaibekov, Azim
Nensa, Felix
Zeng, Xiangtai
Dralle, Henning
Article History
Received: 22 January 2019
Accepted: 26 March 2019
First Online: 10 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional committee (votum of the ethics committee Medical Faculty, University Duisburg-Essen: No.19-8597-BO) 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.