Johansen, Ståle Emil
Panzner, Martin
Mittet, Rune
Amundsen, Hans E. F.
Lim, Anna
Vik, Eirik
Landrø, Martin
Arntsen, Børge
Article History
Received: 3 July 2018
Accepted: 9 January 2019
First Online: 20 March 2019
Competing interests
: The authors declare no competing interests.