Funding for this research was provided by:
Ministry of Health, Welfare and Sport (N/A)
Received: 25 May 2018
Accepted: 19 December 2018
First Online: 11 January 2019
Ethics approval and consent to participate
: The Ethics Review Board of the Tilburg School of Social and Behavioral Sciences approved the study (Reference: EC-2017.66). Informed consent was prospectively obtained from participants by the use of a written consent form.
: The authors confirm that they have received written permission from Ned Kock to use the image in Fig. InternalRef removed and from Sebastiaan Peek to use the image in Fig. InternalRef removed.
: The authors declare that they have no competing interests.
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