Småbrekke, Silje http://orcid.org/0000-0002-1706-6685
Schirmer, Henrik
Melsom, Toralf
Solbu, Marit Dahl
Eriksen, Bjørn Odvar
Article History
Received: 29 November 2017
Accepted: 25 April 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: This study complied with the Declaration of Helsinki and was approved by the Norwegian Data Inspectorate and the Regional Committee for Medical and Health Research Ethics of North Norway. All subjects provided written consent.
: Not applicable.
: The authors declare that they have no competing interests.
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