VDR and breast cancer: All variant distributions were in Hardy–Weinberg equilibrium (Hardy, 1908; Deng et al., 2001) in the entire genotyped cohort (p > 0.05) except VDR rs11568820, which was within expected proportions in the self-reported White cohort (p = 0.61) indicating the presence of population admixture (Early Breast Cancer Trialists’ Collaborative Group, 2015).