Fig. 2

a Serum levels of galectin-9 in RA patients with or without RA-related interstitial lung disease (ILD). We compared serum levels of galectin-9 between RA patients with or without RA-related ILD. Serum levels of galectin-9 were significantly higher in patients with RA-related ILD compared to those without RA-related ILD. b Serum levels of galectin-9 in RA patients with or without smoking history. We compared serum levels of galectin-9 between RA patients with or without smoking history. There was no significant difference in serum levels of galectin-9 between RA patients with and without smoking history