Published on in Vol 21, No 6 (2019): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13500, first published
.
1 Fred Hutchinson Cancer Research Center, Seattle, WA, United States
2 Kaiser Permanente Washington Health Research Institute, Seattle, WA, United States
3 Paul G Allen School of Computer Science and Engineering, University of Washington, Seattle, WA, United States