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Frequencies of DR4 risk alleles in HCV-infected patients with and without HCC. Figure A shows the frequency of carriers with a DR4 626 C risk allele, and figure B the frequency of patients with the homozygous DR4 683AA genotype. Figure C shows the frequency of patients who carried either the 626CG or 626CC risk genotype in combination with the homozygous DR4 683AA genotype. Differences between the various patient groups were analyzed by chi2 statistics.
