Affiliation: | Medical Research Council Unit, Banjul, The Gambia (M.J. Hossain, A. Roca, G.A. Mackenzie, M. Jasseh, M.I. Hossain, S. Muhammad, M. Ahmed, O.D. Chidiebere, N. Malick, S.M. Bilquees, U.N. Ikumapayi, B. Kampmann, T. Corrah, S. Howie, U. D’Alessandro); ;Ministry of Health, Banjul (B. Jeng, B. Njie, M. Cham); ;Institute of Tropical Medicine, Antwerp, Belgium (U. D’Alessandro) |