Published on in Vol 9, No 9 (2020): September
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18071, first published
.
1 The National Institute for Health Innovation, The University of Auckland, Auckland, New Zealand
2 School of Population Health, The University of Auckland, Auckland, New Zealand
3 Centre for Tobacco Control Research, School of Medicine, The Zhejiang University, Hangzhou, China