1 Division of HIV, Infectious Diseases, and Global Medicine, University of California San Francisco, San Francisco, CA, USA.
2 Division of HIV, Infectious Diseases, and Global Medicine, University of California San Francisco, San Francisco, CA, USA. Electronic address: sdeeks@php.ucsf.edu.
3 Global Health Discovery & Translational Sciences, The Bill & Melinda Gates Foundation, Seattle, WA, USA. Electronic address: mike.mccune@gatesfoundation.org.