Competing interests
RSM has received STI testing supplies, provided to the University of Washington, from Hologic Corporation. RVB declares support from the US National Institutes of Health, the Bill and Melinda Gates Foundation, and the World Health Organization. Regeneron Pharmaceuticals covered abstract and manuscript writing costs outside the submitted work. RVB serves on a Gilead Sciences DMC, for which she receives an honorarium. The other authors declare that they have no competing interests.