Analysis of association between OS and PFS and miR-155 expression. Kaplan-Meier plot depicting OS (A-C) and PFS (D-F) of R-CHOP-treated patients with DLBCL in the meta-cohort, consisting of R-CHOP–restricted Lymphoma/Leukemia Molecular Profiling Project and International DLBCL Rituximab-CHOP Consortium MD Anderson Project data. Before analysis, data were ComBat normalized to compensate for study-wise batch effect. Analyses were conducted for all patients with DLBCL (A,D), ABC-classified patients (B,E), and GCB-classified patients (C,F). For each cohort, patients were dichotomized by median split of MIR155HG expression.