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ROC analyses for serum haptoglobin to differentiate (A) NSCLC from normal healthy controls; (B) NSCLC patients with Lym-Neg from Nor; (C) NSCLC patients with Lym-Pos from Nor; (D) NSCLC patients with Lym-Pos from Lym-Neg. Nor, Normal healthy controls, Lym-Neg, Lymph node metastasis negative, Lym-Pos, Lymph node metastasis positive.
