Brogaard, Louise
Heegaard, Peter M. H.
Larsen, Lars E.
Mortensen, Shila
Schlegel, Michael
Dürrwald, Ralf
Skovgaard, Kerstin
Article History
Received: 17 September 2015
Accepted: 1 February 2016
First Online: 19 February 2016
Competing interests
: The authors declare no competing financial interests.