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Authors
Løvgren, André http://orcid.org/0000-0003-4128-7071
Røssberg, Jan Ivar
Nilsen, Liv
Engebretsen, Eivind
Ulberg, Randi
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Funding
Funding for this research was provided by:
Vestfold Hospital Trust
The University of Oslo
Oslo University Hospital
The MRK Foundation
Josef og Haldis Andresens Legat
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Article History
Received: 24 January 2018
Accepted: 18 March 2019
First Online: 21 March 2019
Ethics approval and consent to participate
: Regional Committees for Medical and Health Research Ethics in Norway approved the study protocol and the information given to the patients (REC Central, 2011/1424). Written informed consent was obtained from each participant, aged 16–18 years at inclusion. According to Norwegian legislation, ethical consent for participation in research may be given from age 16.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
