To determine if the IFNL4 rs368234815 genotype modifies the association between HHV-8 and prostate cancer, we stratified the participants into those carrying a ΔG allele (ΔG/TT or ΔG/ΔG) vs. those without the ΔG allele (TT/TT). The gene discussed is IFNL4; the disease is Familial prostate cancer.