Figure 1

Study design. Trial phases, study groups and study periods. B, baseline; I, intranasal insulin; P, intranasal placebo. t=time point (in months) at which development and behaviour were assessed.
Study design. Trial phases, study groups and study periods. B, baseline; I, intranasal insulin; P, intranasal placebo. t=time point (in months) at which development and behaviour were assessed.