Description of signatures used in this work.

Signature: signature name; Training dataset: public training data set if used in this work; Validation dataset: public test data set if used in this work; Signature size: reported signature size in the original paper (genes or features):; Training sample size (good + poor): sample size of training data set, separating good and poor prognosis when reported; Training outcome: outcome used to derive the signature; Training platform: platform used for the training data set; Signature validation: type of validation for signature if performed; Independent validation outcome: outcome used for independent validation if performed; Validation results: for each validation performed, accuracy classification measures or association assessing if provided; Reference: PMID and reference for publishing paper. * Frequencies of subgroups were not available. Abbreviations: TMA: tissue microarray; cv: cross-validation; ns: not specified.