Published on in Vol 8, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17638, first published
.
1 School of Computer Science and Technology, Dalian University of Technology, Dalian, China
2 Department of VIP, The Second Hospital of Dalian Medical University, Dalian, China