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Analysis of biomarkers in training datasets. A, CTC level of blood samples in patients with non–small-cell lung cancer (NSCLC) (red) and healthy controls (blue). B, CTC level of blood samples in patients with early-stage NSCLC (light blue) and patients with late-stage NSCLC (purple). C, The relative expression levels of mRNAs of saliva samples in NSCLC patients (red) and healthy controls (blue). ∗P < .05; ∗∗P < .01; ∗∗∗P < .001. CTC = circulating tumor cell.
