Published on in Vol 8, No 10 (2020): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17522, first published
.
1 National Institute for Health Innovation, School of Population Health, University of Auckland, Auckland, New Zealand
2 School of Population Health, University of Auckland, Auckland, New Zealand
3 Centre for Tobacco Control Research, Zhejiang University, Hangzhou, China