##### Computational cost for the whole process #####
      Computational time (seconds)
Direct  5
KMR     54
PKMR    55
em      87
KCCA    134

##### 3-fold cross-validation #####
      AUC     AUPR    Sens    Spec    PPV
Direct  0.590   0.016   0.017   0.990   0.021
KMR     0.696   0.044   0.094   0.991   0.117
PKMR    0.707   0.052   0.112   0.991   0.138
em      0.688   0.039   0.082   0.990   0.101
KCCA    0.618   0.020   0.028   0.990   0.035

AUC: Area under the ROC curve
AUPR: Area under the Precision-Recall curve
Sens: Sensitivity
Spec: Specificity:
PPV: Positive predictive value

Note that the upper one percentile in the prediction score is chosen
as a threshold for Sens, Spec and PPV, because high-confidence
prediction results are interesting in practical applications.