Published on in Vol 7, No 6 (2019): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13384, first published
.
1 School of Engineering, Kyoto University of Advanced Science, Kyoto, Japan
2 Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
3 Advanced Technology Division, CAC Corporation, Tokyo, Japan