Pihlstrøm, Lasse
Rengmark, Aina
Bjørnarå, Kari Anne
Dizdar, Nil
Fardell, Camilla
Forsgren, Lars
Holmberg, Björn
Larsen, Jan Petter
Linder, Jan
Nissbrandt, Hans
Tysnes, Ole-Bjørn
Dietrichs, Espen
Toft, Mathias
Article History
Received: 11 December 2014
Revised: 1 March 2015
Accepted: 6 March 2015
First Online: 9 April 2015
Competing interests
: The authors declare no conflict of interest.