CD34 and leukemia: Although we found no overall significance of differential expression of these genes between the CD34‐positive and CD34‐negative leukemias comparing the gene level P‐values against the global P‐value distribution, we did see a significant enrichment of the genes in the CD34‐positive leukemias in the rank‐based gene set enrichment analysis (GSEA) (P = 0.0007, Fig. S5A).