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Authors
Landgraff, Ida Kalstad https://orcid.org/0000-0003-2238-4415
Myrstad, Marius https://orcid.org/0000-0002-9682-5255
Ranhoff, Anette Hylen https://orcid.org/0000-0001-8690-4753
Talsnes, Ove https://orcid.org/0000-0002-0326-2095
Holvik, Kristin https://orcid.org/0000-0003-3132-2822
Meyer, Haakon E. https://orcid.org/0000-0002-3262-8260
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Funding
Funding for this research was provided by:
Vestre Viken Hospital Trust
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Article History
Received: 7 November 2025
Accepted: 2 January 2026
First Online: 26 January 2026
Declarations
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: The study and data linkages have been approved by the Regional Committee for Medical and Health Research Ethics (REK Sør-Øst A, ref 15538), Statistics Norway, the Norwegian Directorate of Health, and the Norwegian Institute of Public Health. The data were handled in accordance with the General Data Protection Regulation, and a Data Protection Impact Assessment has been conducted.
: During the screening conducted in 1972 – 1973, written informed consent was not obtained. However, participants were informed that the data collected would also be used for research purposes. Approval for the use of these data in mortality follow-up has been granted by the Data Inspectorate and the Norwegian Board of health.
: None.
: Data from the Norwegian Patient Registry have been used in this publication. The interpretation and reporting of these data are the sole responsibility of the authors, and no endorsement by the Norwegian Directorate of Health is intended nor should be inferred.
