BRCA1 and breast cancer: Interestingly, the rs200802208 Indel located near SULT1A1 was imputed from these arrays and analyses showed that the del allele was associated with decreased risk of breast cancer in BRCA1 pathogenic variant carriers (HR = 0.48, 95%CI 0.29–0.79, p = 4.3 × 10−3)5.