Skjærvø, Sandra H.
Wefring, Espen T.
Nesdal, Silje K.
Gaukås, Nikolai H.
Olsen, Gerhard H.
Glaum, Julia
Tybell, Thomas https://orcid.org/0000-0003-0787-8476
Selbach, Sverre M.
Article History
Received: 18 October 2015
Accepted: 26 October 2016
First Online: 7 December 2016
Competing interests
: The authors declare no competing financial interests.