ESR1 and breast cancer: Bandera et al. [5] present results from the African American Breast Cancer Epidemiology and Risk (AMBER) Consortium showing that, among premenopausal women, BMI at age 18 years was inversely associated with risk of ER+ breast cancer but not with risk of ER– breast cancer or TNBC (BMI ≥30 vs. BMI = 20–24.9 kg/m2, ER+ OR = 0.65, 95% CI = 0.42–1.01; ER– OR = 1.00, 95% CI = 0.63–1.58; TNBC OR = 1.08, 95% CI = 0.59–1.98).