Published on in Vol 6, No 4 (2018): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10519, first published
.
1 Centre for Behavioural Science & Applied Psychology, Sheffield Hallam University, Sheffield, United Kingdom
2 School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom
3 The Open University, Milton Keynes, United Kingdom