Funding for this research was provided by:
Received: 6 February 2019
Accepted: 30 July 2019
First Online: 9 August 2019
Ethics approval and consent to participate
: Ethical guidelines were followed and clearance from the ethics committee of the German Psychological Society (JZ062009) and written informed consent including consent for publication from study participants was obtained.
: Obtained from participants.
: The authors declare that they have no competing interests.