Kristiansen, Lene http://orcid.org/0000-0001-6662-9117
Magnussen, L. H.
Wilhelmsen, K. T.
Mæland, S.
Nordahl, S. H. G.
Clendaniel, R.
Hovland, A.
Juul-Kristensen, B.
Article History
Received: 6 June 2019
Accepted: 14 August 2019
First Online: 7 October 2019
Ethics approval and consent to participate
: Ethical approval was gained by the Regional Committee for Medical and Health Research Ethics (2014–00921) prior to recruitment of participants. All participants signed an informed consent prior to study participation.
: Not applicable.
: The authors declare that they have no competing interests.