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Light micrographs of von Kossa staining performed on (A) undifferentiated (control) and (B) osteodifferentiated hMSCs after incubation with all the nanocomponents (CN, NL, GA, CN-NL, CN-NL/GA) for 15 days at the highest concentrations in the tested ranges. Original magnification 200×; scale bar = 100 µm.
