Buus, Terkild Brink http://orcid.org/0000-0001-7180-6384
Ødum, Niels http://orcid.org/0000-0003-3135-5624
Geisler, Carsten
Lauritsen, Jens Peter Holst
Article History
Received: 12 July 2017
Accepted: 29 October 2017
First Online: 4 December 2017
Competing interests
: The authors declare no competing financial interests.