Jacobsen, Sten Eirik W. http://orcid.org/0000-0002-1362-3659
Nerlov, Claus http://orcid.org/0000-0002-0544-735X
Article History
Received: 23 February 2018
Accepted: 2 October 2018
First Online: 2 January 2019
Competing interests
: The authors declare no competing interests.