KIR3DL1 and psoriasis: In this study, we observed that imputed KIR CN alone is not sufficient to affect psoriasis risk, not even previously implicated KIR genes such as KIR3DL1 and KIR2DS1. It is possible that KIR alleles and allotypes are associated with psoriasis risk but KIR CN alone is not sufficient to account for psoriasis risk.