About the Authors

Thomas N Williams, Tabitha W Mwangi, Sammy Wambua, Moses Kortok, Robert W Snow, Kevin Marsh
Kenya Medical Research Institute/Wellcome Trust Programme, Centre for Geographic Medicine Research, Coast, Kilifi District Hospital, Kilifi, Kenya

Thomas N Williams, Robert W Snow, Kevin Marsh
Nuffield Department of Medicine, John Radcliffe Hospital, Oxford, United Kingdom

Thomas N Williams
Department of Paediatrics, John Radcliffe Hospital, Oxford, United Kingdom

David J Roberts
Blood Research Laboratory, National Blood Service—Oxford, John Radcliffe Hospital, Oxford, United Kingdom

David J Roberts
Nuffield Department of Clinical Laboratory Sciences, John Radcliffe Hospital, Oxford, United Kingdom

Neal D Alexander
Medical Research Council Tropical Epidemiology Group, London School of Hygiene and Tropical Medicine, London, United Kingdom

David J Weatherall
Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, United Kingdom

Corresponding Author

twilliams@ kilifi.mimcom.net

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

TNW, TWM, DJR, DJW, and KM designed the study. TNW, NDA, SW, and MK analyzed the data. TNW wrote the paper.