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Authors
Hjorth, S. https://orcid.org/0000-0003-2841-5868
Vandraas, K. F. https://orcid.org/0000-0002-6093-3385
Trewin-Nybråten, C. B. https://orcid.org/0000-0001-8236-9423
Botteri, E. https://orcid.org/0000-0002-9023-8068
Ursin, G. https://orcid.org/0000-0002-0835-9507
Andreassen, B. K. https://orcid.org/0000-0001-5087-2913
Støer, N. C. https://orcid.org/0000-0001-8994-9332
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Funding
Funding for this research was provided by:
South-Eastern Norway Regional Health Authority (2022058)
Norwegian Institute of Public Health
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Article History
Received: 3 November 2025
Accepted: 24 December 2025
First Online: 7 January 2026
Declarations
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: The authors have no competing interests to declare that are relevant to the content of this article.
: This research was performed in compliance with relevant laws and institutional guidelines and have been approved by the Regional Committee for Medical and Health Research Ethics, Southeast Norway (nr 2018/775).
: Consent to participate was waived by the Regional Committee for Medical and Health Research Ethics, Southeast Norway (nr 2018/775). The use of patient registry data in this study is legally authorized under the GDPR, based on Articles 6(1)(e) and 9(2)(j), which allow data processing for research purposes in the public interest. In addition, the study is supported by a legal exemption from confidentiality obligations, as granted under the Health Register Act §19e.
: Not applicable.
