Published on in Vol 5, No 10 (2017): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/8233, first published
.
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1 Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
2 Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
3 Institute of Social Medicine, Epidemiology and Health Economics, Charité University Medical Centre, Berlin, Germany