(
A-B) Two datasets,
GSE26682 and
GSE24551, each chip from two different platforms (
GPL570 &
GPL96 for
GSE26682 and
GPL5175 &
GPL11028 for
GSE24551), were assigned in six subtypes according to the classifier. The top and left bars indicated the subtypes. In the heatmap, rows indicated genes from the classifier and columns represent patients. The heatmap was color-coded on the basis of median-centered log
2 gene expression levels (red, high expression; blue, low expression). SubMap plots, located in the bottom panel, assessed expressive similarity between corresponding subtypes from two different cohorts.