Frisvoll, C.
Clarke-Jenssen, J.
Madsen, J. E.
Flugsrud, G.
Frihagen, F.
Andreassen, G. S.
Bere, T.
Funding for this research was provided by:
Oslo university Hospital
Article History
Received: 19 September 2018
Accepted: 10 January 2019
First Online: 12 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.