Survival benefit in HCC was also associated with a number of other key NK cell–associated genes including NKG7, KLRK1 (NKG2D), KLRB1 (CD94), KLRD1 (CD161), and KLRF1 (NKp80), thus excluding innate lymphoid cells as a potential confounding variable for ncr1 expression (Table 1) (45). Here, KLRD1 is linked to hepatocellular carcinoma.