Campbell et al., comparing the gene expression in the CML CD34+ cells isolated from 22 CML patients’ samples to the normal CD34+ cells, showed that expression of TERT was downregulated in over half of the samples from patients in the chronic phase, significantly downregulated in two out of three patients in the accelerated phase and in all CML CD34+ cells isolated from patients in blastic phase. Here, CD34 is linked to chronic myelogenous leukemia, BCR-ABL1 positive.