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Authors
Haugen, Olav H.
Michelet, John-Thomas
Aslaksen, Anne Kathinka
Horgen, Gro
Skranes, Jon
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Funding
Funding for this research was provided by:
University of Bergen
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Article History
Received: 7 March 2025
Accepted: 18 August 2025
First Online: 13 November 2025
Declarations
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: The main study adhered to the Declaration of Helsinki and was approved by the Regional Committee for Medical Research Ethics South East Norway (2017/712). Written informed consent was obtained from the parents or guardian of all the children in the study. An age-appropriate information was given to all participants. The additional inclusion of control children at centre B was approved by the same committee in a separate amendment.
: The authors declare no competing interests.
