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CSA of UCSC and individual segments. A) The CSA of UCSC for each patient group (PLS, ALS C9–, PMA and ALS C9+) was compared to their age- and gender-matched controls (CON). Solid lines denote the mean CSA and dashed lines reflect the mean ± standard deviation boundaries. B) Comparison between patient and control groups for cervical segments C1–C4.
