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Article History

Received: 9 September 2018

Accepted: 5 December 2018

First Online: 21 December 2018

Ethics approval and consent to participate

: 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.

: All patients gave written consent for publication of their anonymized data.

: On behalf of all authors, the corresponding author states that there is no conflict of interest.

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