Text and Data Mining valid from 2018-11-09
Received: 15 August 2018
Accepted: 29 October 2018
First Online: 9 November 2018
Ethics approval and consent to participate
: Approval from the local institutional review board of the University Hospital Regensburg was obtained for this retrospective study. 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 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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