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Recovery following DNA damage in hUCB-MSCs. (A, C) Cells treated with the indicated concentration of hydrogen peroxide for 30 min were washed with PBS and then incubated in fresh media for the indicated number of hours. Comet assays were then performed. Values of olive tail moment after treatment with 500 μM (B) or 50 μM (D) of hydrogen peroxide are presented. The P values were <0.0001 (B) and >0.05 (D).
