(r) Steen  Steensen,  Elsebeth  Frey,  Harald  Hornmoen,  Rune  Ottosen  and  Maria Theresa  Konow-Lund.  Published  by  Emerald  Publishing  Limited.  This  article  is published  under  the  Creative  Commons  Attribution  (CC  BY  4.0)  licence.  Anyone may reproduce, distribute,  translate  and create derivative works of this article  (for both  commercial  and  non-commercial  purposes),  subject  to  full  attribution  to  the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
Except where otherwise noted, this item's license is described as (r) Steen Steensen, Elsebeth Frey, Harald Hornmoen, Rune Ottosen and Maria Theresa Konow-Lund. Published by Emerald Publishing Limited. This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode