Fig. 2From: Clinical significance of interleukin-6, total bilirubin, CD3 + CD4 + T cells counts in the acute exacerbation of connective tissue disease-associated interstitial lung disease: a cross-sectional studyThe levels of IL-6, IL-8, and TNF-α in CTD-ILD, CTD-non-ILD, and HCs. A–C Serum IL-6, IL-8, and TNF-α levels were significantly higher in patients with CTD-ILD than in CTD-non-ILD (all P < 0.05). *P < 0.05, **P < 0.01, ***P < 0.001Back to article page