We next determined and compared the mean percentages of functional molecules and receptors of NK cell subsets including NKG2D, NKP44, NKG2C, CD96 (evaluated on 20 out of 30 patient samples), CXCR3 (evaluated on 20 out of 30 patient samples), perforin, and granzyme B in patients with BC and HDs (Supporting Information S1: Table S1). Here, NCR2 is linked to breast cancer.