1. Department of Medicine and Center for Infectious Diseases, Stellenbosch University, Cape Town, South Africa
2. Department of Epidemiology and Center for Global Health, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
3. Departments of Epidemiology and International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Service de Maladies Infectieuses et Tropicale, Centre Hospitalier Universitaire de Fann, Université Cheikh Anta Diop, Dakar, Senegal
5. Department of Infection, Division of Infection and Immunity, Centre for Clinical Microbiology, University College London, London, United Kingdom
6. National Institute for Health Research Biomedical Research Centre, University College London Hospitals, London, United Kingdom