Published on in Vol 21, No 5 (2019): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12426, first published
.
1 Medical School, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
2 Digitally Enabled PrevenTative Health Research Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
3 Global Digital Health Unit, Department of Primary Care and Public Health, Imperial College London, London, United Kingdom