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PFS and OS for stage II and for patients with stage III-IV disease. Seven-year PFS for stage II 84.7% (95% CI, 81.0 to 87.7) and III/IV 73.4% (95% CI, 69.7 to 76.8). Seven-year OS for stage II 95.6% (95% CI, 93.2 to 97.2) and III/IV 88.7% (95% CI, 85.7 to 91.0). OS, overall survival; PFS, progression-free survival.
