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Cerebral activation group analyses for contrast ‘tasks vs. rest’ obtained with the four EPI sequences (columns 1 to 4). (a) Random effects activation t-maps overlaid on a single-subject T1-weighted image with the voxelwise significance threshold level p < 0.001 uncorrected for multiple comparisons. (b) Inter-subject and (c) intra-subject variance maps overlaid on a single-subject T1-weighted image.
