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ROC curves of N-NOSE by pathological stage.
Area under the ROC curve for N-NOSE (red line), CEA (black dotted line), and CA19-9 (grey line) in stages 0 and I (a), stage II (b), and stages III and IV (c).
CA19-9 indicates carbohydrate antigen 19-9; CEA, carcinoembryonic antigen; N-NOSE, Nematode-NOSE; ROC, receiver operating characteristic.
