Text and Data Mining valid from 2018-06-28
Received: 28 March 2018
Accepted: 13 June 2018
First Online: 28 June 2018
Ethics approval and consent to participate
: All participants were informed about potential risks and gave informed written consent prior to enrollment in the investigation. The experiment was approved by the Board for Ethical Questions in Science of the University of Innsbruck (46/2015), and all procedures of the study were done in accordance with the Helsinki Declaration (1964).
: Not applicable.
: The authors declare that they have no competing interests.
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