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Authors
Skeie, Ivar
Bech, Anne Berit
Clausen, Thomas
Hjemsæter, Arne Jan
Landheim, Anne Signe
Monsbakken, Bent
Thoresen, Magne
Waal, Helge
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Article History
Received: 18 March 2025
Accepted: 16 January 2026
First Online: 18 February 2026
Declarations
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: The study was approved by the Regional Committee for Medical and Health Research Ethics, Health Region South-East (ID 2014/1936 C). All participants alive gave their written consent before taking part in the original study and could decline participation in the follow-up study. Exemption from professional secrecy duty of confidentiality for those dead was given by the Norwegian Directorate of Health (original studies, see Fig. ) and the Ethics Committee (above, follow-up study).
: Not applicable.
: The authors declare no competing interests.
