Published on in Vol 4, No 4 (2018): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9332, first published
.
1 Department of Prevention and Community Health, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
2 Department of Epidemiology and Biostatistics, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
*these authors contributed equally