Published on in Vol 23, No 2 (2021): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/21465, first published
.
1 JC School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
2 NeoHealth, Hong Kong, China
3 Department of Early Childhood Education, Faculty of Education and Human Development, The Education University of Hong Kong, Hong Kong, China