Published on in Vol 23, No 2 (2021): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/24165, first published
.
1 Department of Public Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
2 Office of Dental Education, School of Dentistry, Seoul National University, Seoul, Republic of Korea