Received: 10 December 2020
Accepted: 18 March 2021
First Online: 26 March 2021
: The study was conducted in accordance with the Declaration of Helsinki, and the protocol was approved by the Ethical Committee of the Open University of the Netherlands (registration number: U2019/02040/HVM). Informed consent from respondents was taken electronically prior to them undertaking the survey.
: Not applicable.
: The authors declare that they have no competing interest