Breast cancer risk markedly lower with serum 25-hydroxyvitamin D concentrations ≥60 vs <20 ng/ml (150 vs 50 nmol/L): Pooled analysis of two randomized trials and a prospective cohort

By S. McDonnell, C. Baggerly, Christine B. French, L. Baggerly, C. Garland, E. Gorham, B. Hollis, D. Trump, J. Lappe. 2018