FUT4 and chronic myelogenous leukemia, BCR-ABL1 positive: To restrict the list to genes that could explain the specific features of CP‐CML CD34+CD15− cells, we considered only promoters that were aberrantly methylated specifically in this cell subset and identified 81 and 18 genes that could be abnormally expressed and repressed, respectively, only in CP‐CML CD34+CD15− cells (Fig. S6B and Table S6).