We therefore examined the associations with AD of the DBH -1021T allele and of the above interactions in the Epistasis Project , with 1757 cases of AD and 6294 elderly controls .
O O O O O O B-DiseaseOrPhenotypicFeature O O B-GeneOrGeneProduct B-SequenceVariant O O O O O O O O O O O O O O O B-DiseaseOrPhenotypicFeature O O O O O