Funding for this research was provided by:
German Federal Ministry of Education and Research (01EH1202A)
Text and Data Mining valid from 2018-08-20
Received: 13 November 2017
Accepted: 10 August 2018
First Online: 20 August 2018
Ethics approval and consent to participate
: Ethical approval was given by the ethical review board of the Technische Universität Berlin (BU_05_20150311). Individual written informed consent was obtained.
: Not applicable.
: The authors declare that they have no competing interest.
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