Funding for this research was provided by:
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (017.006.090, 451-15-014, 452-12-005)
Received: 16 March 2020
Accepted: 16 May 2020
First Online: 30 May 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This research has been approved by the Ethics Committee Social Science of Radboud University (ECG2012-13 04-025). It was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki.
: Written informed consent was obtained in all participants before participation.