Therefore, statistical models could include either KIR2DL2 or KIR2DS2. The multivariate analysis revealed the following independent risk factors for posttransplant CMV infection: lack of KIR2DS2, presence of KIR2DL2-HLA-C1 and KIR2DL3, allograft dysfunction, earlier time of antiviral prophylaxis initiation, lymphocytopenia before day 90 posttransplantation, and high-risk D/R serostatus (Table 5). Here, KIR2DL3 is linked to cytomegalovirus infection.