CD34 and breast cancer: More recently, Ko et al. [34] performed a methylation analysis (HM450K arrays) and RNA-seq analysis of 7 healthy donors (CD34+ cells from bone marrow), 28 CP (CD34+ cells from peripheral blood and bone marrow) and 30 BC samples (n = 18 acute myeloid leukemia and n = 12 acute lymphoblastic leukemia; CD34+ cells from peripheral blood and bone marrow).