CD38 and B-cell chronic lymphocytic leukemia: analyzed different hematopoietic fractions: HSC plus MPP (HSC+MPP, Lin−CD34+CD38lowCD45RA−CD90+/−); downstream hematopoietic progenitor cell populations containing CLP and CMP (Lin−CD34+CD38+); mature T cells (CD3+CD19−) and monocytes (CD14+CD19−) in samples from CLL patients.