1. Amsterdam University Medical Centres, Academic Medical Centre at the University of Amsterdam, Laboratory for Experimental Parasitology, Department of Clinical Microbiology and Infection Prevention, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
2. MRC Unit The Gambia at the LSHTM, Atlantic Boulevard, Fajara, Banjul P.O. Box 273, The Gambia