Petersen, Annabeth Høgh
Aagaard, Mads Malik
Nielsen, Henriette Roed
Steffensen, Karina Dahl
Waldstrøm, Marianne
Bojesen, Anders
Article History
Received: 7 July 2015
Revised: 30 October 2015
Accepted: 26 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no conflict of interest.