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Forest plot of univariate analysis on progression-free survival of selected subgroups.
A shift to the left favored additional rituximab. X-axis: Hazard ratio. IPI: International Prognostic Index; LR: low-risk; HR: high-risk; R-IPI: Revised IPI; NCCN-IPI: National Comprehensive Cancer Network-IPI GCB: germinal center B-cell; BCRs: B-cell receptors; TLRs: Toll-like receptors; TNFR: tumor necrotic factor receptor.
