Received: 30 May 2021
Accepted: 25 October 2021
First Online: 17 November 2021
: All procedures were in accordance with the Helsinki II Declaration and Danish law. Approval from the Danish Data Protection Agency was obtained (Journal nr. 2014-41-3018). According to Danish Law (no 593 of 14th June 2011) studies based entirely on data collected from registers and questionnaires do not need approval from the ethics committee [CitationRef removed]. All participants gave informed consent before inclusion, and they could withdraw their consent at any time in the study process.
: Not applicable.
: The authors declare that they have no competing interests.