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Osteogenic, adipogenic, and chondrogenic differentiation of USCs, BMSCs, and PDB-MSCs stained, respectively, with Alizarin Red (scale bar = 100 μm), Oil Red O (scale bar = 20 μm), and Toluidine Blue (scale bar = 50 μm). BMSCs: bone marrow-derived mesenchymal stem cells; PDB-MSCs: placenta decidua basalis-derived mesenchymal stem cells; USCs: urine-derived stem cells.
