Kullinger, Merit
Granfors, Michaela
Kieler, Helle
Skalkidou, Alkistis http://orcid.org/0000-0002-4935-7532
Article History
Received: 7 December 2017
Accepted: 29 March 2018
First Online: 2 May 2018
Competing Interests
: The authors declare no competing interests.