Zhang et al. [91] found no BRCA1 mutation carriers among a cohort of 118 Barbadian BC patients who were genotyped for six of the recurrent BRCA1 discovered previously among Nigerian patients with invasive BC in a study conducted in 2012 to identify recurrent BRCA1 and BRCA2 mutations in BC patients of African ancestry. Here, BRCA1 is linked to breast cancer.