Published on in Vol 7, No 10 (2019): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/14926, first published
.
1 Department of Computer Science and Technology, Tsinghua University, Beijing, China
2 National Institute of Health Data Science, Peking University, Beijing, China
3 Computer Science Department, University of California, Davis, CA, United States