Vestergaard, Christian L. http://orcid.org/0000-0001-5329-475X
Mikkelsen, Morten Bo http://orcid.org/0000-0001-7936-2052
Reisner, Walter
Kristensen, Anders
Flyvbjerg, Henrik http://orcid.org/0000-0002-1691-9367
Article History
Received: 10 March 2015
Accepted: 17 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no competing financial interests.