BACKGROUND : Recent data has suggested that polymorphisms in the prostate specific antigen ( PSA ) may increase prostate cancer ( PC ) risk .
O O O O O O O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O O