1. From the Swiss Tropical and Public Health Institute and the University of Basel, Basel, Switzerland (G.F., C.L.); Ifakara Health Institute, Dar es Salaam, Tanzania (S.M., S.A., R.K., H.M., F.O.); Mailman School of Public Health, Columbia University, New York (S.P.K.); and the London School of Hygiene and Tropical Medicine, London (J.S.).