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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 ...
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 ...