Published on in Vol 4, No 4 (2018): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10989, first published
.
1 Centres for Disease Control and Prevention, Atlanta, GA, United States
2 Joint United Nations Programme on AIDS, Geneva, Switzerland
3 Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom