SLC6A3 and major depressive disorder: DAT positive fibres in the sgACC differed significantly between the groups F(3, 69) = 7.029, p < 0.001, with lower fibre density in DLB cases overall (p = 0.004) and in DLB cases with depression compared to controls (p < 0.001) but not in non-depressed DLB donors (Fig. 2F).