Molecular markers of resistance to amodiaquine plus sulfadoxine-pyrimethamine in an area with seasonal malaria chemoprevention in south central Niger par Grais, R, Laminou, I, Woi-Messe, L, Makarimi, R, Bouriema, S, Langendorf, C, Amambua-Ngwa, A, D'Alessandro, U, Guérin, P, Fandeur, T, Sibley, C