Published on in Vol 21, No 2 (2019): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10450, first published
.

1 Institute for Research Initiatives, Nara Institute of Science and Technology , Ikoma , JP
2 Graduate School of Science and Technology, Nara Institute of Science and Technology , Ikoma , JP
3 Data Science Center, Nara Institute of Science and Technology , Ikoma , JP
4 Musashikosugi Hospital, Nippon Medical School , Kawasaki , JP
5 Nippon Medical School Hospital, Nippon Medical School , Bunkyo , JP