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For the five ROIs, structural features included four categories: (i) local features from sMRI data including the volume of the amygdala and the grey matter density of the other four ROIs; (ii) region-wise connectivity features from dMRI data including connection density and connection cost in each ROI; (iii) pair-wise connectivity features from dMRI data corresponding to tract strength between the amygdala and each of the other four ROIs; and (iv) network features from dMRI data including network efficiency for the network composed of all five ROIs and for each subnetwork composed of three ROIs.
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