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Authors
Mjelle, Robin
Sjursen, Wenche
Thommesen, Liv
Sætrom, Pål
Hofsli, Eva
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Article History
Received: 8 October 2018
Accepted: 29 January 2019
First Online: 20 February 2019
Ethics approval and consent to participate
: The project is approved by the Regional Committees for Medical and Health Research Ethics (REK-midt) with the following reference number: 2010/955. Study participants gave informed consent in accordance with the Declaration of Helsinki.
: 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.
