Heuckendorff, Signe https://orcid.org/0000-0002-4074-064X
Johansen, Martin Nygård
Johnsen, Søren Paaske
Overgaard, Charlotte
Fonager, Kirsten
Article History
Received: 1 May 2020
Accepted: 15 March 2021
First Online: 21 March 2021
Declarations
:
: Ethical approval is not needed for register-based studies in Denmark. The project was approved by Statistics Denmark before gaining access to the data.
: Not applicable.
: The authors declare that they have no competing interests.