Published on in Vol 6, No 12 (2018): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10026, first published
.

1 Division of Population Medicine , Cardiff University, Cardiff , GB
2 Centre for Medical Education , Cardiff University, Cardiff , GB
3 Section of Oncology, Palliative Care Medicine, Cardiff University, Cardiff , GB