Published on in Vol 21 , No 1 (2019) :January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10875, first published
.

1 Section of Patient Centred Outcomes Research, Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, GB
2 School of Psychology, University of Leeds, Leeds, GB
3 Leeds Teaching Hospitals NHS Trust, Leeds, GB