Bergkvist, Johanna
Klawonn, Isabell
Whitehouse, Martin J. http://orcid.org/0000-0003-2227-577X
Lavik, Gaute
BrĂ¼chert, Volker
Ploug, Helle
Article History
Received: 16 January 2017
Accepted: 19 June 2018
First Online: 3 August 2018
Competing interests
: The authors declare no competing interests.