 Secondary clinical outcomes: 1 mean days of fever; 2 incidence of febrile episodes; 3 mean haemoglobin at study end; 4 change in mean haemoglobin; 5 prevalence of splenomegaly; 6 prevalence of parasitaemia; 7 incidence of visits to health care facilities, and hospitalizations; 8 mortality rate; 9 anthropometric measurements; 10 proportion of appropriate treatments; 11 proportion of delayed treatments; 12 treatment incidence density of treatments given at 50 and at full dose 