Published on in Vol 22, No 8 (2020): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16761, first published
.
1 Department of International Industrial Engineering, National Institute of Technology Ibaraki College, Hitachinaka, Japan
2 Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan