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Spontaneous coexpression of neural markers by undifferentiated rMSCs (P4) after 14 days of culture. Nestin was labelled in green (a, d, and g), and the other neural markers in red: βIII-tubulin (b); GFAP (e); NeuN (h). Merges (c, f, and i). Bars: 50 μm.
