1. Wellcome Centre for Infectious Disease Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory
2. Department of Medicine, University of Cape Town, Groote Schuur Hospital, Observatory, Republic of South Africa
3. Department of Infectious Diseases, Imperial College London, London, UK
4. Francis Crick Institute, London, UK
5. Faculty of Life Sciences, University College London, London, UK