Published on in Vol 7, No 7 (2018): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10913, first published
.
1 Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
2 Faculty of Linguistics, University of Oxford, Oxford, United Kingdom
3 Barts Health NHS Trust, London, United Kingdom