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Boxplot showing differences in GM intensity values of the two significant clusters between LDR + and LDR − . Center lines show the medians; box limits indicate the 25th and 75th percentiles as determined by R software; outliers are represented by dots. * t-test between LDR + versus LDR − , p < 0.05. GM gray matter, LDR + patients with LDR, LDR − patients without LDR
