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Senescence-associated-β-galactosidase staining of aging hCB-ECs. A: hCB-ECs at 18 doublings since passage 1. B: hCB-ECs at 71 doublings since passage 1. C: hCB-ECs at 71 doublings since passage 1 with 20 μM resveratrol. D: hCB-ECs at 71 doublings since passage 1 with 2 μM resveratrol.
