Additional file 2.

Figure S2: Marker expression profiles from MSC and CPC. Both cell types were respectively stained with four markers in different combinations. The percentage of quadruple stained cells is depicted on the y-axis. Due to the varying patient collectives the number of different donors is indicated as n (range). 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