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Title
Influence of MDR1 C3435T, CYP2C19*2 and CYP2C19*3 gene polymorphisms and clinical characteristics on the severity of gastric lesions: a case-control study.
A letter to the editor is presented regarding the influence of MDR1, C3435T, and CYP2C19 gene polymorphisms with the severity of gastro-duodenal endoscopic lesions.