Published on in Vol 22, No 4 (2020): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17201, first published
.
1 Center for Applied Intelligent Systems Research, Halmstad University, Halmstad, Sweden
2 Center for Research on Welfare, Health and Sport, Halmstad University, Halmstad, Sweden