Stav, Ane Løvli
Johansen, Krisztina Kunszt
Auning, Eirik
Kalheim, Lisa Flem
Selnes, Per
Bjørnerud, Atle
Hessen, Erik
Aarsland, Dag
Fladby, Tormod
Article History
Received: 7 July 2015
Revised: 23 October 2015
Accepted: 10 December 2015
First Online: 14 January 2016
Competing interests
: The authors declare no conflict of interest.