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A Recursive Partitioning for OS. Blue ovals represent intermediate subgroups; blue squares represent terminal nodes. Yellow rectangles indicate predictive polymorphism. Fractions within nodes indicate patients who died/total patients with that node. Node 1, 3 represent low risk patients; Node 2, 4 represent intermediate risk patients. Node 5, 6 represent high risk patients. B Kaplan Meier curves for OS nodes
