Funding for this research was provided by:
Medizinische Fakultät, Universität Duisburg-Essen (-)
Text and Data Mining valid from 2020-02-07
Received: 23 August 2019
Accepted: 6 December 2019
First Online: 7 February 2020
Ethics approval and consent to participate
: Approval from the local institutional ethics committee (University Hospital Essen, University Duisburg-Essen) was gained before the study and all participants signed informed consent.
: Written consent for publication was gained before the study of all participants.
: The authors declare that they have no competing interests.