2111 cases and 2579 controls in a Hispanic/Native American population and 1481 cases and 1585 controls in a non-Hispanic white population.Data from the Breast Cancer Health Disparities Study, the 4-Corners Breast Cancer Study, the Mexico Breast Cancer Study and the San Francisco Bay Area Breast Cancer Study.DNA collected from blood or mouthwash samples—whole genome amplification and SNP analyses of 10 genes including CARTPT (5 SNPs) expression. Here, CARTPT is linked to breast cancer.