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In the version of this article initially published online, the legend to Supplementary Figure 1 was omitted. The legend has now been appended to the online supplementary figure.

Supplementary Figure 1 Data from left frontal patients. Correlations between stop signal reaction times (SSRT, ms) and the volume of damage to each region (SFG, IFG, MFG, ORB and MED, cm3) for each patient. SSRT for left frontal patients was 194 ± 44.1 ms, indicating intact response inhibition overall; confirmed by the fact that SSRT was significantly faster than for right frontals (t = 2.2, P < 0.05). SSRT was not significantly positively correlated with damage to any of: SFG (n = 15, r = 0.1, n.s.), MFG (r = −0.47, n.s.), IFG (r = −0.58, P = 0.023), ORB (P = 0.3, n.s.) and MED (r = 0.3, n.s.).