Text and Data Mining valid from 2019-04-26
Received: 15 November 2018
Accepted: 10 January 2019
First Online: 26 April 2019
Ethics approval and consent to participate
: The study protocol was originally approved by the ethics committee of the Westfälische Wilhelms University Münster (2014–370-f-S) on August 19th 2014 and was also approved by all other involved ethics committees. All patients or their legal representative provided written informed consent.
: Not applicable.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.