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Authors
Brager-Larsen, Anne
Zeiner, Pål
Klungsøyr, Ole
Mehlum, Lars
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Article History
Received: 22 January 2021
Accepted: 12 January 2022
First Online: 26 January 2022
Declarations
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: Adolescents and their parents provided written informed consent prior to inclusion. The study was approved by the Regional Committee for Medical Research Ethics, South-East Norway. All methods were carried out in accordance with relevant guidelines and regulations.
: NA.
: The authors declare that they have no competing interests.
