BRCA1 and breast cancer: Other mutations reported at lower prevalence (≤1.0%) in the 1108 familial breast cancer cases included BRCA1:c.3700_3704del (1.0% 10/1018), BRCA1:c.68_69del (0.9%, 9/1018), BRCA1:c.5251C>T (0.6%, 6/1018) and BRCA1:c.5346G>A (0.5%, 5/1108) (Cybulski et al., 2019).