Nilsen, Jan-Vegard http://orcid.org/0000-0002-2750-1185
Rø, Øyvind
Halvorsen, Inger
Oddli, Hanne Weie
Hage, Trine Wiig
Article History
Received: 5 October 2020
Accepted: 9 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Ethics approval was granted by the Regional Committee for Medical Research ethics, South East Norway [REK2014/2223]. All participants gave their written consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.