Thoresen, Sigrid B.
Campsteijn, Coen
Vietri, Marina
Schink, Kay O.
Liestøl, Knut
Andersen, Jens S.
Raiborg, Camilla
Stenmark, Harald
Article History
Received: 22 December 2013
Accepted: 2 April 2014
First Online: 11 May 2014
Competing interests
: The authors declare no competing financial interests.