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Demonstration of periventricular (PV) white matter changes (WMC) with different locations and severities. White matter changes in deep subcortical area (deep-WMC) were demonstrated in A (grade 0), B (grade 1), C (grade 2), and D (grade 3), whereas white matter changes in periventricular area (PV-WMC) were demonstrated in A’ (grade 0), B’ (grade 1), C’ (grade 2), D’ (grade 3).
