Published on in Vol 20, No 8 (2018): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10398, first published
.
1 Planned Parenthood Federation of America, New York, NY, United States
2 Rutgers School of Public Health, Rutgers University, Newark, NJ, United States
*all authors contributed equally