Department of Error

Clarke SE, Jukes MC, Njagi JK, et al. Effect of intermittent preventive treatment of malaria on health and education in schoolchildren: a cluster-randomised, double-blind, placebo-controlled trial. Lancet 2008; 372: 127–38—In this Article (July 12), in paragraph four of the Results section (p 134), the second sentence should have read: “The effect size was 0·18 (95% CI 0·003–0·35) in the counting sounds test and 0·48 (0·09–0·88) in the code transmission test.”