CXCL9 is elevated in newly diagnosed cGVHD from an independent cohort. ELISA results of median plasma concentrations of CXCL9 from no cGVHD patients (n = 33) and newly diagnosed cGVHD patients (n = 86) in a second validation cohort from the FHCRC. Data are illustrated as box and whisker plots with the whiskers indicating the 90th and 10th percentiles.