SLAMF7 and B-cell chronic lymphocytic leukemia: NK cells derived from patients with CLL showed comparable membrane densities of SLAMF1 and SLAMF7 receptors as compared to healthy individuals and there was no difference in the expression of SLAMF1 and SLAMF7 on the NK cells of CLL patients from the SLAMFhigh or SLAMFlow group.