Published on in Vol 20, No 12 (2018): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10802, first published
.
1 Leeds Institute of Biomedical & Clinical Sciences, University of Leeds, Leeds, United Kingdom
2 School of Healthcare, University of Leeds, Leeds, United Kingdom
3 Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, United Kingdom