Increased CXCL9 levels are associated with increased cGVHD severity. (A) ELISA results of median plasma concentration of CXCL9 from no GVHD (n = 82), mild/moderate cGVHD (n = 35), and severe cGVHD (n = 27) from the entire UM cohort. (B) ELISA results of median plasma levels of CXCL9 from no GVHD (n = 33), mild/moderate (mild/mod) cGVHD (n = 49), and severe cGVHD (n = 37) from the newly diagnosed FHCRC cohort. Data are illustrated as box and whisker plots with the whiskers indicating the 90th and 10th percentiles.