Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (LO 2164/1-1)
Article History
Received: 22 May 2018
Accepted: 10 August 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: The study was approved by Ulm University Ethics Commission on January 15, 2015. Participants gave informed written consent after study information had been provided.
: Not applicable.
: The authors declare that they have no competing interests regarding this work.
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