Using the Convert3D Medical Image Processing Tool (
http://www.itksnap.org/pmwiki/pmwiki.php?n=Downloads.C3D), images were cropped and resampled to an isotropic voxel resolution of 1-mm using the default linear algorithm. The input IMAGE was the bias-field-corrected, T1-weighted image from the previous step (e.g., n4.nii). The name for the OUTPUT file was set (e.g., resampled.nii.gz).