However, women with triple negative breast cancer had the lowest vitamin D concentrations among the 4 molecular subtypes after control for age, BMI and season of blood collection (least square mean ± standard error: 23.0±0.5, 21.3±1.3, 21.6±1.6 and 19.9±1.1 ng/mL for luminal A, luminal B, non-luminal HER2+ and triple negative subtypes, respectively, p = 0.046). The gene discussed is ERBB2; the disease is triple-negative breast carcinoma.