Funding for this research was provided by:
Received: 30 January 2018
Accepted: 29 July 2019
First Online: 15 August 2019
Ethics approval and consent to participate
: This research was approved by the institutional ethical committee of the Faculty of Behavioral, Management and Social sciences of the University of Twente (reference number 15028). The healthcare research Involving Human Subjects Act (also known by the Dutch acronym WMO) does not apply to this study [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.