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FIG 4. A and B, Mean (per MRSI voxel) MTR versus NAA/Cr in all MRSI voxels containing more than 25% lesion and less than 10% ventricle for the entire cohort of patients with MS (A) and the relapsing-remitting subgroup (B) (circles indicate relapsing-remitting group; plus signs, primary progressive; diamonds, secondary progressive). The solid lines represent the linear regressions corresponding to linear correlations of rP = .27, P < .0001 (A) and rP = .45, P < .0001 (B)
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