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Cortical fiber density on a representative developing infant at 0, 1, and 2 years of age. (a) Overlaying the fibers (white streamlines) with the cortical surfaces. (b) Fiber density (mm2) on the cortical surfaces. The color bars are shown on the right. [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com.]
