Braadland, Peder R
Giskeødegård, Guro
Sandsmark, Elise
Bertilsson, Helena
Euceda, Leslie R
Hansen, Ailin F
Guldvik, Ingrid J
Selnæs, Kirsten M
Grytli, Helene H
Katz, Betina
Svindland, Aud
Bathen, Tone F
Eri, Lars M
Nygård, Ståle
Berge, Viktor
Taskén, Kristin A
Tessem, May-Britt
Article History
Received: 30 June 2017
Revised: 18 August 2017
Accepted: 1 September 2017
First Online: 3 October 2017
Change Date: 21 November 2017
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Competing interests
: The authors declare no conflict of interest.