1 The Johns Hopkins University School of Medicine, Department of Medicine, Divisions of Clinical Pharmacology & Infectious Disease, Baltimore, MD, USA. Electronic address: eweld@jhmi.edu.
2 Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
3 Harvard Medical School, Department of Global Health & Social Medicine, Boston, MA, USA.
4 The Johns Hopkins University Berman Institute of Bioethics, Baltimore, MD, USA.
5 The Johns Hopkins University School of Medicine, Department of Medicine, Divisions of Clinical Pharmacology & Infectious Disease, Baltimore, MD, USA.