Funding for this research was provided by:
Eberhard Karls Universität Tübingen (Open Access Publishing Fund)
Deutsche Forschungsgemeinschaft
Article History
Received: 9 January 2018
Accepted: 18 December 2018
First Online: 28 January 2019
Authors’ information
: Not applicable.
: The research was conducted in accordance with APA standards for the ethical treatment of participants and we gained informed consent from the participants.
: Not applicable.
: The authors declare that they have no competing interests.
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