Published on in Vol 5 , No 2 (2022) :Apr-Jun
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/28238, first published
.

1 Paediatric Dentistry & Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China (Hong Kong)
2 Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, University of Hong Kong, Hong Kong, China (Hong Kong)
*all authors contributed equally