Received: 12 July 2021
Accepted: 29 March 2022
First Online: 9 April 2022
: The study complies with The Act on Processing of Personal Data, Denmark (Act No. 429 of May 31, 2000), which implements the European Union Directive 95/46/EC on the protection of individuals. The data usage was approved by the Danish Data Protection Agency (file number 2001-54-0180). The data used in this study was anonymised before its use. The ethical and legal aspects of the project were approved by Statistics Denmark, account number 708291. In Denmark, register studies, which do not include medical procedures, are not part of the ethical committee system.
: Not applicable.
: There are no conflicts of interest.