Increased expression of miR-181 family members is associated with favorable OS. (A) USA-set I (n = 33). (B) USA-set II (n = 53). The patients in each set were dichotomized into 2 groups based on the median value of expression signature of a given miR-181 family member. Kaplan-Meier curves were generated to depict outcomes. The P value was determined by log-rank test. | indicates censored. In USA-set II, miR-181c and miR-181d did not have reliable expression value in 1 patient sample.