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Human bone marrow stem cell (hBM-MSC) senescence. β-Galactosidase staining (blue) of hBM-MSCs from donor 2 at P10 (A), donor 3 at P4 (B), donor 5 at P13 (C), donor 6 at P16 (D), and donor 8 at P14 (E). SHSY-5Y cell line (F) was used as negative control of the β-galactosidase staining. Bars, 50 μm.
