RNA expression during AVF maturation. A) Bar graph shows RNA expression of HIF-1α during AVF maturation relative to sham veins, normalized to day 0 expression; p < 0.0001; n=5–8. *, p < 0.0001 (day 3); *, p =0.0015 (day 7). B) Bar graph shows RNA expression of HO-1 during AVF maturation relative to sham veins, normalized to day 0 expression; p < 0.0001; n=5–8. *, p = 0.0063 (day 1); *, p = 0.0033 (day 3); *, p < 0.0001 (day 7). C) Bar graph shows RNA expression of VEGF-A during AVF maturation relative to sham veins, normalized to day 0 expression; p = 0.0001; n=5–8.