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(a,b) Recurrence‐free survival and overall survival curves based on Kaplan–Meier analysis between different pathological stages (I–II/IIIA). (c,d) Recurrence‐free survival and overall survival curves based on Kaplan–Meier analysis according to positive lymph nodes proportion (0%/0–30%/30%). (e,f) Recurrence‐free survival and overall survival curves based on Kaplan–Meier analysis according to positive lymph nodes number (0/1–4/≥5).
