The regulatory module inferred from the first miRNA rule and its corresponding mRNAs. miR-557 and miR-214, the miRNAs of the first HCV+ miRNA rule are placed at the up panel. Four mRNA rules are identified and their mRNAs are placed at in the middle and bottom panels. The edges linking miR-214 and its mRNA targets are in solid lines, while the edges linking miR-557 and its mRNA targets are in dashed lines. The confirmed target mRNAs are also highlighted with an underline.