Published on in Vol 8, No 1 (2019): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12180, first published
.
1 Department of Public Health and Nursing, Norwegian University of Science and Technology , Trondheim , NO
2 Department of Computer Science, Norwegian University of Science and Technology , Trondheim , NO
3 , NO