Published on in Vol 9, No 7 (2021): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/30115, first published
.
1 Department of Computer Science, City University of Hong Kong, Hong Kong, China (Hong Kong)
2 School of Languages and Cultures, The University of Sydney, Sydney, Australia
3 School of Computer Science, South China Normal University, Guangzhou, China