(r) Rune  Ottosen  and  Steen  Steensen.  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 maybe seen athttp://creativecommons.org/licences/by/4.0/legalcode
Except where otherwise noted, this item's license is described as (r) Rune Ottosen and Steen Steensen. 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 maybe seen athttp://creativecommons.org/licences/by/4.0/legalcode