Three courses of SP given bimonthly reduced clinical malaria by 24% and anaemia (Hb<8.0 g/dl) by 30%, and six courses of artesunate plus amodiaquine (AQ) given monthly reduced clinical malaria by 69% and anaemia by 45% in the Hohoe district of Ghana [3]. Here, GSTM1 is linked to anemia (phenotype).