Fig. 7From: Correlation between the efficacy of stem cell therapy for osteonecrosis of the femoral head and cell viabilitya-f Comparison of multilineage differentiation. a, b Alizarin red S staining (× 100) after a 14-day osteogenic induction of hBMSCs. d, e Toluidine blue staining (× 100) after a 14-day chondrogenic induction of hBMSCs. c, f The mean positive area percentage was significantly higher in group A than in group BBack to article page