Fig. 3. The correlation of number of positive markers with OS. (A) Association of no positive marker and at least one positive marker with OS. (B) Association of one or no positive marker and at least two positive markers with OS. (C) Association of two or less positive markers and all three positive markers with OS. Kaplan-Meier curves were used to evaluate the correlation of number of positive markers with OS. Comparison of two groups was made by log-rank test. p<0.05 was considered significant. OS, overall survival.