Suzuki et al. [26] found that the TGF-β1 polymorphism at codon 10 and the hepatic fibrosis levels were not significantly correlated, while Wang et al. [27] found that TGF-β1 allelic variants were more common in Caucasians evaluated, and the presence of prolines in codon 25 or 10 was linked to the interindividual variability in the development of more severe fibrosis in the HCV group. The gene discussed is TGFB1; the disease is Hepatic fibrosis.