1. Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
2. Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, Blantyre, Malawi
3. Liverpool School of Tropical of Medicine, Liverpool, United Kingdom
4. Medical Research Council–University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
5. Department of Radiology, Royal Liverpool University Hospital NHS Trust, Liverpool, United Kingdom
6. Queen Elizabeth Central Hospital, Blantyre, Malawi
7. College of Medicine, University of Malawi, Blantyre, Malawi
8. Queens Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom; and
9. Division of Infection and Immunity, University College London, London, United Kingdom