Published on in Vol 4, No 1 (2018): Jan-Mar
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/8581, first published
.
1 Department of Epidemiology, Boston University School of Public Health, Boston, MA, United States
2 Department of Health, Behavior, and Society, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States
3 Independent Consultant, Warminster, PA, United States