Received: 19 January 2021
Accepted: 13 April 2021
First Online: 1 May 2021
: The local ethics committee ‘CMO region Arnhem-Nijmegen’ approved the study (registration number: 2020–6463). Informed consent was implied by completion and return of the questionnaire as approved by the ethics committee.
: Not applicable.
: The authors declare that they have no competing interests.