Received: 13 January 2021
Accepted: 7 September 2021
First Online: 17 September 2021
: This project was approved by the Danish Data Protection Agency (project number 1–16–02-141-18). All participants signed informed consent at baseline. Baseline and register data were handled according to Danish law. According to Danish law, this type of study does not require approval by committees on biomedical research ethics [CitationRef removed].
: Not applicable.
: None of the authors have any competing interests.