Accordingly, promoter‐specific RT/PCR analysis showed that WT1 overexpression in CP‐CML CD34+CD15− cells initiated mainly from the upstream hypomethylated CpG‐island promoter, because the transcript that initiates from the alternative hypermethylated promoter was not detected (Fig. S7B). This evidence concerns the gene CD34 and chronic myelogenous leukemia, BCR-ABL1 positive.