2 Liverpool School of Tropical Medicine, Liverpool, UK.
3 Royal Liverpool University Hospital, Liverpool, UK.
4 Omdurman Military Hospital, Khartoum, Sudan.
5 Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
6 Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany.
7 Liverpool School of Tropical Medicine, Liverpool, UK. Shevin.Jacob@lstmed.ac.uk.