BRCA1 and ovarian cancer: Although there was a higher risk of breast or ovarian cancer in other general populations compared with the Korean general population (in particular, the other general populations have double the risk of breast cancer), the cumulative risks of breast or ovarian cancer for Korean BRCA1 or BRCA2 carriers were comparable with those of European carriers [22,29,30,31,32,33,34,35,36] (Tables S15 and S16).