1 Harvard Medical School, Harvard University, Boston 02215, MA, USA; The Fenway Institute, Fenway Health, Boston, MA, USA. Electronic address: kmayer@fenwayhealth.org.
2 Institute of HIV Research and Innovation, Bangkok, Thailand.
3 Clinical Trials Research Centre, University of Zimbabwe, Harare, Zimbabwe.
4 Instituto Nacional de Infectologia Evandro Chagas-Fiocruz, Rio de Janeiro, Brazil.