ROC curves revealed that H19 and HULC levels well predict HCC disease-free survival (area under ROC = 0.608, P = 0.005, and area under ROC = 0.578, P = 0.042, resp., Figures 2(a) and 2(b)), while no significance was found between UCA1 and HCC disease-free survival by ROC curve (area under ROC = 0.541, P = 0.282, Figure 2(c)). This evidence concerns the gene H19 and hepatocellular carcinoma.