A randomized, double-blind, placebo-controlled, dose-ranging trial of tafenoquine for weekly prophylaxis against Plasmodium falciparum. by Hale, B, Owusu-Agyei, S, Fryauff, D, Koram, K, Adjuik, M, Oduro, A, Prescott, W, Baird, J, Nkrumah, F, Ritchie, T, Franke, E, Binka, F, Horton, J, Hoffman, S