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Authors
Kielland, Anne https://orcid.org/0000-0001-8321-9427
Liu, Jing https://orcid.org/0000-0001-7489-6426
Anthun, Kjartan Sarheim https://orcid.org/0000-0002-2142-2742
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Funding
Funding for this research was provided by:
Norges Forskningsråd (272674, 272674, 272674)
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Article History
Received: 3 January 2025
Accepted: 30 August 2025
First Online: 22 September 2025
Declarations
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: Ethics approval for the project was provided by the Person-Protection Ombudsman, The Norwegian Center for Research Data (NSD#391132), now SIKT, and The Regional Committees for Medical and Health Research Ethics (REK #7345). The need for written informed consent was waived by the Norwegian Medical and Health Research Ethics (REK) ethics committee due to the retrospective nature of the study.
: Not applicable. Data were collected retrospectively from national registries and patient administrative systems, and it was not possible for the authors to directly identify individuals (e.g., name, address).
: The authors declare no competing interests.
: Not applicable.
