Published on in Vol 7, No 8 (2018): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9296, first published
.
1 King's Technology Evaluation Centre, School of Biomedical Engineering & Imaging Sciences, King's College London, London, United Kingdom
2 Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom