1. Department of Clinical Infection, Microbiology and Immunology, Institute of Infection and Global Health, University of Liverpool, Liverpool, UK.
2. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
3. Department of Parasitology, Liverpool School of Tropical Medicine, Liverpool, UK.
4. Computational Biology Facility, Institute of Integrative Biology, University of Liverpool, Liverpool, UK.
5. Malawi-Liverpool-Wellcome Trust Clinical Research Programme, P.O. Box 30096, Blantyre 3, Malawi.