Ringgren, Kristian Bundgaard http://orcid.org/0000-0002-5004-6694
Mills, Elisabeth Helen Anna
Christensen, Erika Frischknecht
Mortensen, Rikke Nørmark
Torp-Pedersen, Christian
Kragholm, Kristian Hay
Article History
Received: 27 January 2020
Accepted: 26 October 2020
First Online: 12 November 2020
Ethics approval and consent to participate
: In Denmark, studies on registry data requires no specific ethical permission.
: Not applicable.
: The authors declare that they have no competing interests.