From the Harvard T.H. Chan School of Public Health, Boston (F.C.); the Research Institute of Health Sciences, Ouagadougou, Burkina Faso (A.D.); Medicines for Malaria Venture, Geneva (C.D.); Shoklo Malaria Research Unit, Mae Sot (F.N., A.P.P.), and the Mahidol Oxford Tropical Medicine Research Unit (N.W.), Bangkok - both in Thailand; Monash University, Clayton, Australia (S.O.); and Imperial College London, London (F.O.).