Additional file 1.

Figure S1: Flow cytometric analysis of MSC (black) and CPC (gray) marker expression. Open histograms represent marker-specific antibodies. Gray shaded histograms represent isotype control. CPC: chondrogenic progenitor cells; MSC: mesenchymal stromal cells.

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Joos et al. Arthritis Research & Therapy 2013 15:R119   doi:10.1186/ar4299