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Vitamin D and mammographic density in postmenopausal women: A cohort study nested within a chemoprevention trial
Background: Vitamin D may be important in the causal pathway to breast cancer (BC) by influencing mammographic breast density (MD). However, previous study results in postmenopausal women are inconsistent. Study objectives ...
Hormonal factors and insulin-like growth factor-1 in North American postmenopausal women
Background: Mechanisms underlying the effect of estrogen exposure on breast cancer risk remain unclear. Insulin-like growth factor-1 (IGF-1) levels have been positively associated with breast cancer and are a potential ...