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Comparative survival outcomes according to three-laddered pretreatment SIRI groups (red line: SIRI-1, IIIB and SIRI < 1.9; dark blue line: SIRI-2, IIIB and SIRI ≥ 1.9 or IIIC and SIRI < 1.9; and green line: SIRI-3, IIIC and SIRI ≥ 1.9): (a) progression-free survival; (b) overall survival.
