Funding for this research was provided by:
Text and Data Mining valid from 2020-03-30
Received: 5 November 2019
Accepted: 3 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: This retrospective study was approved by the ethics committee of the University Hospital of Münster (AZ 2014–217-fN).
: Not applicable.
: The authors declare that they have no competing interests.