Results obtained from an alternative RE-score calculation method based on expression comparison. (a) Distributions of the t-scores calculated by comparing the RE-scores from the expression comparison method. The employed target prediction algorithm was PITA. The t-score distributions for the five datasets are shown in different colors. (b) Correlation between the t-scores obtained from the two different RE-score calculation methods. The microarray dataset used was VA, published by van't Veer et al. . The correlation coefficient (R) is 0.928, indicating that the t-scores obtained using expression comparison and rank comparison are highly correlated.