Nordgård, Anna Synnøve Røstad http://orcid.org/0000-0002-6214-4662
Bergland, Wenche Hennie
Bakke, Rune
Østgaard, Kjetill
Bakke, Ingrid
Article History
Received: 18 June 2018
Accepted: 7 October 2018
First Online: 26 October 2018
Competing Interests
: The authors declare no competing interests.