One such study including 359 patients found that donor type (HID/matched related donor), receipt of ATG, MMF, corticosteroid receipt within 30 days, and low presence of CD3+ CD8+ immune were associated with increased risk of CMV infection, with donor type and low (<14.825%) CD3+ CD8+ cells retaining significance in multivariate analysis, suggesting independent predictive value (24). This evidence concerns the gene CD8A and cytomegalovirus infection.