Tangen, Ingvild L
Kopperud, Reidun K
Visser, Nicole CM
Staff, Anne C
Tingulstad, Solveig
Marcickiewicz, Janusz
Amant, Frédéric
Bjørge, Line
Pijnenborg, Johanna MA
Salvesen, Helga B
Werner, Henrica MJ
Trovik, Jone
Krakstad, Camilla
Article History
Received: 26 April 2017
Revised: 23 June 2017
Accepted: 28 June 2017
First Online: 27 July 2017
Competing interests
: The authors declare no conflict of interest.