1. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
2. Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, United Kingdom
3. Clinical Research Network, North West Coast, United Kingdom
4. University College London Great Ormond Street Institute of Child Health, London, United Kingdom
5. Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
6. Aintree University Hospital, Liverpool, United Kingdom; and
7. Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi