Published on in Vol 22, No 8 (2020): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19056, first published
.
1 National Sun Yat-Sen University, Kaohsiung, Taiwan
2 National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
*all authors contributed equally