Published on in Vol 8, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18495, first published
.
1 Department of Population Health Sciences, School of Population Health and Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
2 University of Otago, Wellington, New Zealand
*all authors contributed equally