Andersen, Hanne Flåten
Foss, Carl Erik Lie
Voje, Jorunn
Tronstad, Ragnar
Mokkelbost, Tommy
Vullum, Per Erik
Ulvestad, Asbjørn
Kirkengen, Martin
Mæhlen, Jan Petter
Article History
Received: 20 June 2019
Accepted: 29 September 2019
First Online: 15 October 2019
Competing Interests
: The authors(s) declare no competing interests, except for Jorunn Voje, Ragnar Tronstad and Tommy Mokkelbost, who works in a commercial company, Elkem. They took no part in the actual writing of this paper and only served as the supplier of material and discussion partner during project meetings. This work was part of a collaborative project with SINTEF, Elkem, UNIK and UiO, and has been financed by the Research Council of Norway (project 219523/O30).