Funding for this research was provided by:
Received: 9 April 2020
Accepted: 25 August 2020
First Online: 17 September 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all respondents. Our study was submitted to the Medical Research Ethics Committee (MREC) Utrecht (Medisch Ethische Toetsingscommissie (METC) Utrecht). The committee confirmed that the Medical Research Involving Human Subjects Act (WMO) does not apply to our study and that therefore an official approval of our study by the committee was not required (dossier no. 19–156/C).
: Not applicable.
: The authors declare that they have no competing interests.