Mysterud, Atle http://orcid.org/0000-0001-8993-7382
Rivrud, Inger M.
Gundersen, Vegard
Rolandsen, Christer M. http://orcid.org/0000-0002-5628-0385
Viljugrein, Hildegunn http://orcid.org/0000-0002-3798-5267
Article History
Received: 9 August 2019
Accepted: 11 February 2020
First Online: 16 March 2020
Competing interests
: The authors declare no competing interests.