WT1 and chronic myelogenous leukemia, BCR-ABL1 positive: 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).