Seip, Knut Lehre http://orcid.org/0000-0002-7464-0567
Grøn, Øyvind
Funding for this research was provided by:
Oslo and Akershus University College for Applied Sciences
Article History
Received: 20 June 2016
Accepted: 20 December 2016
First Online: 10 January 2017
Compliance with ethical standards
:
: There is no competing financial interests for any of the authors.