Funding for this research was provided by:
Received: 22 June 2020
Accepted: 10 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: Not applicable. Under Dutch law this study is exempt from approval by an ethics committee because it did not involve patients, interventions or burdening procedures [CitationRef removed]. Written consent for use of data was obtained from all participants.
: Not applicable.
: All authors declare that they have no competing interests.