We also analyzed non-Hodgkin's lymphoma (NHL) and again observed a protective effect of the KIR AA genotype (OR = 0.47, 95% CI = 0.26–0.88, p = 0.017), which was statistically significant in spite of the small sample size (N = 46: Figure 2A). This evidence concerns the gene KIR3DL1 and non-Hodgkin lymphoma.