However, Woo et al. found that inflammatory cytokines (IL-1β, IL-4, IL-6, IL-8, IL-10, IL12, IFN-γ, and TNF-α) and growth factors (IGF-1 and VEGF) in cord blood samples may not predict ROP (64). This evidence concerns the gene CXCL8 and retinopathy of prematurity.