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Figure 3 Prevalence of thrombus (A) and mean (±SD) color grade (B) in patients with HL (solid bars) and patients without HL (hatched bars). The prevalence of thrombus and the mean color grade immediately after reperfusion and at one month were not different between the patients with HL and those without HL. The mean color grade at six months was significantly higher in the patients with HL. 0 M = immediately after reperfusion; M = months after reperfusion. *p < 0.05 vs. patients without HL.