Huserbråten, Mats Brockstedt Olsen https://orcid.org/0000-0003-1209-617X
Eriksen, Elena
Gjøsæter, Harald https://orcid.org/0000-0001-7694-6503
Vikebø, Frode
Article History
Received: 8 April 2019
Accepted: 10 October 2019
First Online: 7 November 2019
Competing interests
: The authors declare no competing interests.