Figure 1: Release of VEGF into the plasma fraction of stored leukoreduced apheresis platelet units over 5 days (N = 8). Aliquots of platelets were centrifuged and supernatant VEGF levels were quantified by ELISA.*p < .05 vs. day 1 value, **p < .001 vs. day 1 value. Results are depicted as group mean ± SEM