IGFBP4 and dermatomyositis: The serum levels of IGFBP-2, IGFBP-4, and CTGF were higher in DM patients than in HCs (258.9 (176.4–326.1) ng/mL vs. 167.7 (116.1–209.4) ng/mL, p < 0.0001; 450.4 (327.3–631.8) ng/mL vs. 392.2 (339.0–480.2) ng/mL, p = 0.0404; and 45.71 (38.54–57.45) ng/mL vs. 35.52 (30.23–41.52) ng/mL, p = 0.001, respectively) (Figures 1(b), 1(d), and 1(f)).