Published on in Vol 4, No 4 (2018): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10770, first published
.
1 Division of HIV/AIDS and Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention; Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, Atlanta, GA, United States