ERCC2 and hepatocellular carcinoma: One study in the present meta-analysis did not provide definite criteria for HCC diagnosis.33 The genotype distributions of the controls in 2 studies were inconsistent with HWE for the XPD Lys751Gln polymorphism17,31 and 2 were inconsistent with HWE for the XPD Asp312Asn polymorphism.16,18