Published on in Vol 7, No 2 (2018): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/8110, first published
.

1 Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo , NO
2 Research and Development , The Norwegian Air Ambulance Foundation, Drøbak , NO
3 Department of Neurology , Oslo University Hospital, Oslo , NO
4 Department of Neurology , Østfold Hospital, Kalnes , NO