Åsbakk, Kjetil http://orcid.org/0000-0003-1776-5715
Landehag, Jörgen
Skogen, Andreas
Nilssen, Arne C.
Article History
Received: 27 November 2017
Revised: 21 November 2018
Accepted: 11 December 2018
First Online: 19 December 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.