Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (MA 6775/3)
Article History
Received: 31 January 2019
Accepted: 9 July 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: All patients provided written informed consent. The ethics committee of the University of Witten/Herdecke approved the study.
: Not applicable. The manuscript contains no individual person’s data.
: The authors declare that they have no financial or scientific competing interests. The funding body has no role in the design of the study or collection, analysis and interpretation of data or in writing the manuscript.