Published on in Vol 21, No 5 (2019): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12390, first published
.
1 King's College London, Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, London, United Kingdom
2 Center for Behavioral Intervention Technologies, North Western University, Chicago, IL, United States
*all authors contributed equally