Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01EC1009A)
Text and Data Mining valid from 2018-03-14
Received: 27 October 2017
Accepted: 8 February 2018
First Online: 14 March 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Charité – Universitätsmedizin Berlin. Participants were included in the study after they provided informed consent.
: All authors had full access to all data and approved the final version of the manuscript for publication.
: The authors declare that they have no competing interests.
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