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Percent change in pial arteriolar diameter (±SE) during 2 h of MCAO and 20 min of reperfusion with continuous superfusion of vehicle (0.1% ethanol) starting at 15 min of MCAO. One group underwent zero-link bovine Hb (ZL-HbBv) exchange transfusion at 35 min of MCAO (n = 9) and another group was not transfused (n = 9). Two-way ANOVA indicated no significant interaction between treatment groups and time (P = 0.47).
