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Survival outcomes by stage- Stage was inversely proportional to patients’ 2-year OS rates among the entire cohort: stage I 88.0% (95% CI 83.0–93.4%), stage II 77.5% (95% CI 73.3–81.9%), stage III 54.3% (95% CI 49.2–59.9%), and stage IV 40% (95% CI 30.8–52.2%) (log rank, p < 0.001).
