Pettersson, John H.-O.
Shi, Mang
Bohlin, Jon
Eldholm, Vegard
Brynildsrud, Ola B.
Paulsen, Katrine Mørk
Andreassen, Åshild
Holmes, Edward C.
Article History
Received: 4 May 2017
Accepted: 23 August 2017
First Online: 7 September 2017
Competing Interests
: The authors declare that they have no competing interests.