Adam, Birgit
Klawonn, Isabell
Svedén, Jennie B
Bergkvist, Johanna
Nahar, Nurun
Walve, Jakob
Littmann, Sten
Whitehouse, Martin J
Lavik, Gaute
Kuypers, Marcel M M
Ploug, Helle
Article History
Received: 6 October 2014
Revised: 7 June 2015
Accepted: 18 June 2015
First Online: 11 August 2015
Competing interests
: The authors declare no conflict of interest.