Romann, Julien
Valmalette, Jean-Christophe
Chauton, Matilde Skogen
Tranell, Gabriella
Einarsrud, Mari-Ann
Vadstein, Olav
Article History
Received: 6 July 2015
Accepted: 29 October 2015
First Online: 2 December 2015
Competing interests
: The authors declare no competing financial interests.