Funding for this research was provided by:
Open University of The Netherlands
Article History
First Online: 22 March 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study. The Dutch MWO (Law on Medical Scientific Research) did not apply; the study was therefore approved through standard internal (Open Universiteit NL) procedures.