Fig. 2From: The significance of serum S100 calcium-binding protein A4 in silicosisSerum levels of TGF-β1, CTGF, IL-6 and TNF-α in the subjects. The secretions of a TGF-β1, b CTGF, c IL-6 and d TNF-α in serum were detected by ELISA. CG, control group; SI, stage I of silicosis; SII, stage II of silicosis; SIII, stage III of silicosis. *p < 0.05Back to article page