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Overall survival curves for patients with GBC by LN count. (A) Patients with fewer than six LNs examined according to the TNM staging system; (B) Patients with six or more LNs examined according to the TNM staging system; (C) Patients with fewer than six LNs examined according to the TNrM staging system; and (D) Patients with six or more LNs examined according to the TNrM staging system.
