Published on in Vol 9 , No 11 (2020) :November
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/24136, first published
.

1 Graduate School of Human–Environment Studies, Kyushu University, Fukuoka, Japan
2 Faculty of Arts and Science, Kyushu University, Fukuoka, Japan