In consideration of the technical limitations of PrognoScan-based Kaplan-Meier plots, which were constructed based on the transcriptome of whole tumor tissues, we set two criteria as follows: (1) ERG is used as a prognostic marker because its expression is highly limited to ECs, while FLI1 is expressed in other cell populations such as myeloid cells [13]; (2) the probe set 213541_s_at is used because it is validated in the current study. Here, ERG is linked to neoplasm.