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Histogram of Dystonia Severity scores categories.
The horizontal line shows the total dystonia rating score, none (0); mild (>0 ≤ 20); mild to moderate (>20 ≤ 40); moderate (>40 ≤ 70) and severe (>70 ≤ 100), while the vertical line represents the number of patients in each category. The dotted line represents the normal distribution curve.
