Funding for this research was provided by:
Received: 12 August 2020
Accepted: 14 January 2021
First Online: 27 January 2021
Compliance with ethical standards
: The authors report no potential conflicts of interest regarding this study.
: Ethical approval was from the ‘Commissie Mensgebonden Onderzoek’ (Committee on Research Involving Human Subjects) of the region Arnhem-Nijmegen.
: All participants gave written, informed consent to participate.