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Pro-C2 evaluated in supernatant from HEX cultured in presence 0.1–100 ng/mL of IGF-1, FGF-2 or TGF-β1. HEX cultured without treatment (WO) was applied for comparison of treatment effect. The red line indicates the average background level of 10 nM originating from the FBS of the media. Error bars are shown as SEM. * p < 0.05.
