1. Malawi Liverpool Wellcome Programme , Blantyre , Malawi
2. Clinical Sciences Department, Liverpool School of Tropical Medicine , Liverpool , United Kingdom
3. Department of Environmental and Community Health, School of Global Public Health, Kamuzu University of Health Sciences , Blantyre , Malawi
4. Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool , Liverpool , United Kingdom
5. Department of Genetics, University of Cambridge , Cambridge , United Kingdom
6. World Health Organization , Geneva , Switzerland
7. Department of Medical Laboratory Sciences, School of Life Sciences and Health Professions, Kamuzu University of Health Sciences , Blantyre , Malawi
8. Ministry of Health, Government of Malawi , Lilongwe , Malawi