Støa, Eva Maria
Meling, Sondre
Nyhus, Lill-Katrin
Glenn Strømstad,
Mangerud, Karl Magnus
Helgerud, Jan
Bratland-Sanda, Solfrid
Støren, Øyvind
Article History
Received: 29 September 2016
Accepted: 9 January 2017
First Online: 3 February 2017
Compliance with ethical standards
:
: There is no conflict of interest.
: No external funding was received from any organizations in this project.