Gransjøen, Ann Mari http://orcid.org/0000-0001-7930-1022
Wiig, Siri
Lysdahl, Kristin Bakke
Hofmann, Bjørn Morten
Article History
Received: 20 November 2017
Accepted: 9 July 2018
First Online: 16 July 2018
Ethics approval and consent to participate
: The study has ethical approval from the Norwegian Social Science Data Services (NSD) (Ref. 48,267, 06 May 2016). All participants signed a consent form, which was also approved by the Norwegian Social Science Data Services.
: Not applicable.
: The authors declare that they have no competing interests.
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