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Kaplan–Meier analysis of CONUT groups (low: <3 and high: ≥3) for RFS in negative and positive lymph node metastasis group (A, B), in small and large tumor size group (small: <6.2 cm and large: ≥6.2 cm) (C, D), in low and high CA199 group (low: <793.8 U/ml and high ≥793.8 U/ml) (E, F), and in negative and positive perineural invasion group (G, H).
