Funding for this research was provided by:
Austrian Science Fund (P 26584)
Text and Data Mining valid from 2018-09-17
Received: 1 March 2018
Accepted: 6 September 2018
First Online: 17 September 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the University of Vienna (No. 00071); all participants gave written informed consent in advance.
: Not applicable
: The authors declare that they have no competing interests.
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