Published on in Vol 7, No 6 (2019): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13257, first published
.
1 Asthma UK Centre for Applied Research, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, United Kingdom
2 Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, United Kingdom