Aabenhus, Rune https://orcid.org/0000-0001-9354-2236
Hansen, Malene Plejdrup
Saust, Laura Trolle
Bjerrum, Lars
Article History
Received: 9 September 2016
Revised: 28 April 2017
Accepted: 2 May 2017
First Online: 19 May 2017
Competing interests
: All authors declare that they have no competing financial interests.