Nordby, Yngve
Richardsen, Elin
Rakaee, Mehrdad
Ness, Nora
Donnem, Tom
Patel, Hiten R. H.
Busund, Lill-Tove
Bremnes, Roy M.
Andersen, Sigve
Article History
Received: 26 October 2016
Accepted: 23 January 2017
First Online: 24 February 2017
Competing interests
: The authors declare no competing financial interests.