Published on in Vol 21, No 2 (2019): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12400, first published
.
1 School of Health Sciences, Faculty of Health & Medical Sciences, University of Surrey, Guildford, United Kingdom
2 School of Psychology, Faculty of Health & Medical Sciences, University of Surrey, Guildford, United Kingdom