These CD56+ PSC‐NK cells do not express T cell markers of TCR and CD3, nor B cell marker CD19; whereas more than 60% CD56+ PSC‐NK cells also express CD8α (Figure 2) as compared with ≈30% of PB CD56+ NK cells, the increase of which is associated with disease regression in AIDS patients.49 Here, NCAM1 is linked to AIDS.