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Receiver operating characteristic (ROC) curves for the ability of the four individual miRNAs (A–D) and the 4-miRNA panel (E) to differentiate the CAC patients from the control group in the training phase. Comparison of ROC curves for the ability of the 4-miRNA panel and carcinoembryonic antigen (CEA) (F) to differentiate the CAC patients from the control group in the validation phase.
