PURPOSE : The purpose of this study was to analyze the value of germline and tumor thymidylate synthase ( TS ) genotyping as a prognostic marker in a series of colorectal cancer patients receiving adjuvant fluorouracil ( FU ) -based treatment .
O O O O O O O O O O O O O O O B-DiseaseOrPhenotypicFeature B-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature B-OrganismTaxon O O B-ChemicalEntity O B-ChemicalEntity O O O O