Text and Data Mining valid from 2018-12-01
Received: 9 September 2018
Accepted: 5 December 2018
First Online: 21 December 2018
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: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The study was reviewed and approved by the local ethics committee of the Ruhr-Universität Bochum medical department (Reg. Nr.: 18–6269 BR). Written informed consent was obtained from all participants.
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