Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01GY1315)
Text and Data Mining valid from 2018-09-14
Received: 11 May 2018
Accepted: 23 August 2018
First Online: 14 September 2018
Ethics approval and consent to participate
: Approval of the study was granted by the Charité – Universitätsmedizin Berlin Ethics Commission (Ref EA2/028/14). Written informed consent was obtained from all participants.
: The participants gave written consent to publication of the data.
: The authors declare that they have no competing interests.
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