EPHX1 and cancer: Totally, when reviewed in full-text, 4 were not concerned with Tyr113His or His139Arg polymorphisms in EPHX1 gene, 37 were not cancer risk studies, 1 was not published in English, 1 was not provided in full text, 7 were not case–control studies, 30 were no usable reported data, and 19 were meta-analysis or reviews; all these publications were excluded.